Photochromic compounds

ABSTRACT

A photochromic compound is provided, which may be a pyran, an oxazine, or a fulgide. The photochromic compound has at least one substituent Q attached thereto, each Q independently being —N3, —CN, —COOR′, —CCR′, —C(R′)C(R′)R′, —OCOR′, —OCOOR′, —SR′, —OSO2R′″, and/or CON(R′)R′, wherein each R′ is hydrogen, an unsubstituted or substituted alkyl group having from 1 to 18 carbon atoms; an unsubstituted or substituted aryl group, an unsubstituted or substituted alkene or alkyne group having from 2 to 18 carbon atoms, wherein the substituents are halo or hydroxyl and R′″ is —CF3 or a perfluorinated alkyl group having from 2 to 18 carbon atoms The number, locations and nature of the constituents Q are dependent upon the structure of the photochromic compound.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a divisional of U.S. patent application Ser. No. 15/219,513, filed on Jul. 26, 2016, which is a divisional of U.S. patent application Ser. No. 14/174,978, filed Feb. 7, 2014, now U.S. Pat. No. 9,405,041 B2, which is a divisional of U.S. patent application Ser. No. 13/452,030, filed Apr. 20, 2012, now U.S. Pat. No. 8,705,160 B2, which is a divisional of U.S. patent application Ser. No. 12/329,092, filed Dec. 5, 2008, now U.S. Pat. No. 8,211,338 B2, which is a continuation-in-part of U.S. patent application Ser. No. 10/846,629, filed May 17, 2004, now U.S. Pat. No. 7,342,112 B2, which claims the benefit of U.S. Provisional Application No. 60/484,100, filed Jul. 1, 2003, all of which are hereby specifically incorporated by reference.

STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT

Not applicable.

REFERENCE TO A SEQUENCE LISTING

Not applicable.

BACKGROUND

Various non-limiting embodiments disclosed herein relate generally to photochromic compounds. Other non-limiting embodiments relate to devices and elements made using the photochromic compounds disclosed herein.

Conventional photochromic compounds have at least two states, a first state having a first absorption spectrum and a second state having a second absorption spectrum that differs from the first absorption spectrum, and are capable of switching between the two states in response to at least actinic radiation. Further, conventional photochromic compounds can be thermally reversible. That is, conventional photochromic compounds are capable of switching between a first state and a second state in response to at least actinic radiation and reverting back to the first state in response to thermal energy. As used herein “actinic radiation” means electromagnetic radiation, such as but not limited to ultraviolet and visible radiation that is capable of causing a response. More specifically, conventional photochromic compounds can undergo a transformation in response to actinic radiation from one isomer to another, with each isomer having a characteristic absorption spectrum, and can further revert back to the first isomer in response to thermal energy (i.e., be thermally reversible). For example, conventional thermally reversible photochromic compounds are generally capable of switching from a first state, for example a “clear state,” to a second state, for example a “colored state,” in response to actinic radiation and reverting back to the “clear” state in response to thermal energy.

Dichroic compounds are compounds that are capable of absorbing one of two orthogonal plane polarized components of transmitted radiation more strongly than the other. Thus, dichroic compounds are capable of linearly polarizing transmitted radiation. As used herein, “linearly polarize” means to confine the vibrations of the electric vector of light waves to one direction or plane. However, although dichroic materials are capable of preferentially absorbing one of two orthogonal plane polarized components of transmitted radiation, if the molecules of the dichroic compound are not suitably positioned or arranged, no net linear polarization of transmitted radiation will be achieved. That is, due to the random positioning of the molecules of the dichroic compound, selective absorption by the individual molecules will cancel each other such that no net or overall linear polarizing effect is achieved. Thus, it is generally necessary to suitably position or arrange the molecules of the dichroic compound within another material in order to form a conventional linear polarizing element, such as a linearly polarizing filter or lens for sunglasses.

In contrast to the dichroic compounds, it is generally not necessary to position or arrange the molecules of conventional photochromic compounds to form a conventional photochromic element. Thus, for example, conventional photochromic elements, such as lenses for photochromic eyewear, can be formed, for example, by spin coating a solution containing a conventional photochromic compound and a “host” material onto the surface of the lens, and suitably curing the resultant coating or layer without arranging the photochromic compound in any particular orientation. Further, even if the molecules of the conventional photochromic compound were suitably positioned or arranged as discussed above with respect to the dichroic compounds, because conventional photochromic compounds do not strongly demonstrate dichroism, elements made therefrom are generally not strongly linearly polarizing.

It would be advantageous to provide photochromic compounds that can exhibit useful photochromic and/or dichroic properties in at least one state, and that can be used in a variety of applications to impart photochromic and/or dichroic properties.

BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWING(S)

Various non-limiting embodiments of the present invention will be better understood when read in conjunction with the drawings, in which:

FIG. 1 shows two average difference absorption spectra obtained for a photochromic compound according to various non-limiting embodiments disclosed herein using the CELL METHOD.

FIG. 2 shows a general reaction scheme for preparing photochromic compounds (PC) having different Q groups according to the present invention.

FIGS. 3 and 4 each show general reaction schemes for preparing naphthols having different Q groups according to the present invention.

FIG. 5 shows a reaction scheme for preparing indeno-fused naphthols according to the present invention.

FIG. 6 shows a reaction scheme for preparing naphthols according to the present invention.

DETAILED DESCRIPTION

As used in this specification and the appended claims, the articles “a,” “an,” and “the” include plural referents unless expressly and unequivocally limited to one referent.

Additionally, for the purposes of this specification, unless otherwise indicated, all numbers expressing quantities of ingredients, reaction conditions, and other properties or parameters used in the specification are to be understood as being modified in all instances by the term “about.” Accordingly, unless otherwise indicated, it should be understood that the numerical parameters set forth in the following specification and attached claims are approximations. At the very least, and not as an attempt to limit the application of the doctrine of equivalents to the scope of the claims, numerical parameters should be read in light of the number of reported significant digits and the application of ordinary rounding techniques.

Further, while the numerical ranges and parameters setting forth the broad scope of the invention are approximations as discussed above, the numerical values set forth in the Examples section are reported as precisely as possible. It should be understood, however, that such numerical values inherently contain certain errors resulting from the measurement equipment and/or measurement technique.

Various non-limiting embodiments of the invention will now be described. One non-limiting embodiment provides a thermally reversible, photochromic compound having a Q group at the position described hereinafter and optionally a Lengthening group L also described hereinafter. Another non-limiting embodiment provides a photochromic compound adapted to have at least a first state and a second state, wherein the thermally reversible, photochromic compound has an average absorption ratio greater than 2.3 in at least one state as determined according to the CELL METHOD, which is described in detail below. Further, according to various non-limiting embodiments, the thermally reversible, photochromic compound has an average absorption ratio greater than 2.3 in an activated state as determined according to the CELL METHOD. As used herein, the term “photochromic compound” (PC) includes thermally reversible photochromic compounds chosen from indeno[2′,3′-3,4]naphtho[1,2-b]pyran, indeno[3′,2′-3,4]naphtho[1,2-b]pyran, thiopheno[2′,3′-3,4]naphtho[1,2-b]pyran, thiopheno[3′,2′-3,4]naphtho[1,2-b]pyran, benzothiopheno[2′,3′-3,4]naphtho[1,2-b]pyran, benzothiopheno[3′,2′-3,4]naphtho[1,2-b]pyran, furo[2′,3′-3,4]naphtho[1,2-b]pyran, furo[3′,2′-3,4]naphtho[1,2-b]pyran, benzofuro[2′,3′-3,4]naphtho[1,2-b]pyran, benzofuro[3′,2′-3,4]naphtho[1,2-b]pyran, 2H-naphtho [1,2-b]pyran, 3H-naphtho[2,1-b]pyran, a benzopyran, a spiro[1,3-dihydroindole-3,3′-naphtho [2,1-b][1,4]]oxazine, a spiro[1,3-dihydroindole-2,2′-naphtho[1,2-b][1,4]]oxazine a fulgide and mixtures thereof. As used herein with respect to photochromic compounds, the term “activated state” refers to the photochromic compound when exposed to sufficient actinic radiation to cause the at least a portion of the photochromic compound to switch states. Further, as used herein the term “compound” means a substance formed by the union of two or more elements, components, ingredients, or parts and includes, without limitation, molecules and macromolecules (for example polymers or oligomers) formed by the union of two or more elements, components, ingredients, or parts.

Generally speaking, the CELL METHOD of measuring average absorption ratio of a photochromic compound involves obtaining an absorption spectrum for the photochromic compound, in an activated or unactived state, in each of two orthogonal polarization directions while the photochromic compound is at least partially aligned in an aligned liquid crystal medium that is contained within a cell assembly. More specifically, the cell assembly comprises two opposing glass substrates that are spaced apart by 20 microns +/−1 micron. The substrates are sealed along two opposite edges to form the cell. The inner surface of each of the glass substrates is coated with a polyimide coating, the surface of which has been at least partially ordered by rubbing. Alignment of the photochromic compound is achieved by introducing the photochromic compound and a liquid crystal medium into the cell assembly and allowing the liquid crystal medium to align with the rubbed polyimide surface. Because the photochromic compound is contained within the liquid crystal medium, alignment of the liquid crystal medium causes the photochromic compound to be aligned. It will be appreciated by those skilled in the art that the choice of the liquid crystal medium and the temperature used during testing can affect the measured absorption ratio. Accordingly, as set forth in more detail in the Examples, for purposes of the CELL METHOD, absorption ratio measurements are taken at room temperature (73° F. +/−0.5° F. or better) and the liquid crystal medium is Licristal® E7 (which is reported to be a mixture of cyanobiphenyl and cyanoterphenyl liquid crystal compounds).

Once the liquid crystal medium and the photochromic compound are aligned, the cell assembly is placed on an optical bench (which is described in more detail in the Examples). To obtain the average absorption ratio in the activated state, activation of the photochromic compound is achieved by exposing the photochromic compound to UV radiation for a time sufficient to reach a saturated or near saturated state (that is, a state wherein the absorption properties of the photochromic compound do not substantially change over the interval of time during which the measurements are made). Absorption measurements are taken over a period of time (typically 10 to 300 seconds) at 3 second intervals for light that is linearly polarized in a plane perpendicular to the optical bench (referred to as the 0° polarization plane or direction) and light that is linearly polarized in a plane that is parallel to the optical bench (referred to as the 90° polarization plane or direction) in the following sequence: 0°, 90°, 90°, 0° etc. The absorbance of the linearly polarized light by the cell is measured at each time interval for all of the wavelengths tested and the unactivated absorbance (i.e., the absorbance of the cell with the liquid crystal material and the unactivated photochromic compound) over the same range of wavelengths is subtracted to obtain absorption spectra for the photochromic compound in each of the 0° and 90° polarization planes to obtain an average difference absorption spectrum in each polarization plane for the photochromic compound in the saturated or near-saturated state.

For example, with reference to FIG. 1, there is shown the average difference absorption spectrum (generally indicated 10) in one polarization plane that was obtained for a photochromic compound according to one non-limiting embodiment disclosed herein. The average absorption spectrum (generally indicated 11) is the average difference absorption spectrum obtained for the same photochromic compound in the orthogonal polarization plane.

Based on the average difference absorption spectra obtained for the photochromic compound, the average absorption ratio for the photochromic compound is obtained as follows. The absorption ratio of the photochromic compound at each wavelength in a predetermined range of wavelengths corresponding to λ_(max-vis) +/−5 nanometers (generally indicated as 14 in FIG. 1), wherein), max-vis is the wavelength at which the photochromic compound had the highest average absorbance in any plane, is calculated according to the following equation: AR _(λi) =Ab ¹ _(λi) /Ab ² _(λi)  Eq.1

-   -   wherein, AR_(λi) is the absorption ratio at wavelength λi, Ab¹         _(λi) is the average absorption at wavelength λi in the         polarization direction (i.e., 0° or 90°) having the higher         absorbance, and Ab² _(λi); is the average absorption at         wavelength λi in the remaining polarization direction. As         previously discussed, the “absorption ratio” refers to the ratio         of the absorbance of radiation linearly polarized in a first         plane to the absorbance of the same wavelength radiation         linearly polarized in a plane orthogonal to the first plane,         wherein the first plane is taken as the plane with the highest         absorbance.

The average absorption ratio (“AR”) for the photochromic compound is then calculated by averaging the individual absorption ratios obtained for the wavelengths within the predetermined range of wavelengths (i.e., λ_(max-vis)+/−5 nanometers) according to the following equation: AR=(ΣAR _(λi))/n _(i)  Eq. 2

-   -   wherein, AR is average absorption ratio for the photochromic         compound, are the individual absorption ratios (as determined         above in Eq. 1) for each wavelength within the predetermined the         range of wavelengths (i.e., λ_(max-vis)+/−5 nanometers), and n,         is the number of individual absorption ratios averaged.

As previously discussed, conventional thermally reversible photochromic compounds are adapted to switch from a first state to a second state in response to actinic radiation, and to revert back to the first state in response to thermal energy. More specifically, conventional thermally reversible, photochromic compounds are capable of transforming from one isomeric form (for example and without limitation, a closed form) to another isomeric form (for example and without limitation, an open form) in response to actinic radiation, and reverting back to the closed form when exposed to thermal energy. However, as previously discussed, generally conventional thermally reversible photochromic compounds do not strongly demonstrate dichroism.

As discussed above, non-limiting embodiments disclosed herein provide a thermally reversible photochromic compound having an average absorption ratio greater than 2.3 in at least one state as determined according to CELL METHOD and/or a thermally reversible photochromic compound that can be used as an intermediate in the preparation of a photochromic compound having an absorption ratio greater than 2.3. Thus, the thermally reversible photochromic compound according to this non-limiting embodiment can display useful photochromic properties and/or useful photochromic and dichroic properties. That is, the thermally reversible, photochromic compound can be a thermally reversible, photochromic and/or photochromic-dichroic compound. As used herein with respect to the photochromic compounds described herein, the term “photochromic-dichroic” means displaying both photochromic and dichroic properties under certain conditions, which properties are at least detectable by instrumentation.

According to other non-limiting embodiments, the thermally reversible photochromic compounds can be thermally reversible photochromic-dichroic compounds having an average absorption ratio ranging from 4 to 20, from 3 to 30, or from 2.5 to 50 in at least one state as determined according to CELL METHOD. It will be appreciated by those skilled in the art that the higher the average absorption ratio of the photochromic compound the more linearly polarizing the photochromic compound will be. Therefore, according to various non-limiting embodiments, the thermally reversible photochromic compounds can have any average absorption ratio required to achieve a desired level of linear polarization.

Another non-limiting embodiment provides a thermally reversible, photochromic compound that is free of oxazines and adapted to have at least a first state and a second state, wherein the photochromic compound has an average absorption ratio of at least 1.5 in at least one state as determined according to CELL METHOD. Further, according to this non-limiting embodiment, the average average absorption ratio can range from 1.5 to 50 in at least one state as determined according to CELL METHOD.

In particular embodiments of the present invention, a photochromic material is provided comprising an indeno[2′,3′-3,4]naphtho[1,2-b]pyran, indeno[3′,2′-3,4]naphtho[1,2-b]pyran, thiopheno[2′,3′-3,4]naphtho[1,2-b]pyran, thiopheno[3′,2′-3,4]naphtho[1,2-b]pyran, benzothiopheno[2′,3′-3,4]naphtho[1,2-b]pyran, benzothiopheno[3′,2′-3,4]naphtho[1,2-b]pyran, furo[2′,3′-3,4]naphtho[1,2-b]pyran, furo[3′,2′-3,4]naphtho[1,2-b]pyran, benzofuro[2′,3′-3,4]naphtho[1,2-b]pyran, benzofuro[3′,2′-3,4]naphtho[1,2-b]pyran, 2H-naphtho[1,2-b]pyran, 3H-naphtho [2,1-b]pyran, a benzopyran, a spiro[1,3-dihydroindole-3,3′-naphtho[2,1-b][1,4]]oxazine, a spiro[1,3-dihydroindole-2,2′-naphtho[1,2-b][1,4]]oxazine or a fulgide; wherein:

-   -   (A) said photochromic material has at least one substituent Q         attached thereto at the specific carbon atoms named hereinafter,         each Q independently comprising N₃, —CN, —COOR′, —CCR′,         —C(R′)C(R′)R′, —OCOR′, —OCOOR′, —SR′, —OSO₂R′″, and/or         CON(R′)R′, wherein each R′ independently comprises hydrogen, an         unsubstituted or substituted alkyl group having from 1 to 18         carbon atoms, an unsubstituted or substituted aryl group, an         unsubstituted or substituted alkene or alkyne group having from         2 to 18 carbon atoms, wherein said substituents are chosen from         halo and hydroxyl and R′″ comprises —CF₃ or a perfluorinated         alkyl group having from 2 to 18 carbon atoms; provided wherein:         -   (a) when said photochromic material comprises an             indeno[2′,3′-3,4]naphtho[1,2-b]pyran,             indeno[3′,2′-3,4]naphtho[1,2-b]pyran,             thiopheno[3′,2′-3,4]naphtho[1,2-b]pyran,             thiopheno[3′,2¹-3,4]naphtho[1,2-b]pyran,             benzothiopheno[2′,3′-3,4]naphtho[1,2-b]pyran,             benzothiopheno[3′,2′-3,4]naphtho[1,2-b]pyran,             furo[2′,3′-3,4]naphtho[1,2-b]pyran,             furo[3′,2′-3,4]naphtho[1,2-b]pyran,             benzofuro[2′,3′-3,4]naphtho[1,2-b]pyran,             benzofuro[3′,2′-3,4]naphtho[1,2-b]pyran, Q is attached             thereto at the 7- and/or 10-positions and comprises N₃,             —COOR′, —CCR′, —C(R′)C(R′)R′, —OCOR′, —OCOOR′, —SR′,             —OSO₂R′″ or CN, provided that when said photochromic             material is an indeno[2′,3′-3,4]naphtho[1,2-b]pyran said             material compound is substantially free of substituents at             the 12-position;         -   (b) when said photochromic material comprises a             3H-naphtho[2,1-b]pyran, Q is attached thereto at the 6-             and/or 7-positions and independently comprises for each             occurrence, N₃ or —OCOOR′;         -   (c) when said photochromic material comprises a             2H-naphtho[1,2-b]pyran, Q is attached thereto at the             8-position and comprises N₃; or —OCOOR′, provided that said             photochromic material is substantially free of substituents             at the 5-position;         -   (d) when said photochromic material comprises a benzopyran,             Q is attached thereto at the 7-position and comprises N₃,             —CN, —CCR′, or —OSO₂R′″;         -   (e) when said photochromic material comprises a             spiro[1,3-dihydroindole-2,2′-naphtho [1,2-b][1,4]]oxazine,             substituents Q are attached thereto at the 5-, 6- and/or             8′-positions and independently comprise for each occurrence             —N₃; —CCR′, provided that the indolino group is             substantially free of N-substituents; or —OSO₂R′″, provided             that said photochromic material is substantially free of             carbonyl groups;         -   (f) when said photochromic material comprises a             spiro[1,3-dihydroindole-2,3′-naphtho[2,1-b][1,4]]oxazine,             substituents Q are attached thereto at the 5-, 6-, 6′ and/or             7′-positions and independently comprise for each occurrence             N₃ ; —CCR′, provided that the indolino group is             substantially free of N-substituents; or —OS0₂R″′, provided             that said photochromic material is substantially free of             carbonyl groups; and         -   (g) when said photochromic material comprises a fulgide, Q             comprises —N₃, —CN, —CCR′, or —OSO₂R′″; and     -   (B) optionally, said photochromic material has at least one         lengthening agent L represented by the following formula (which         is described in detail below):         —[S₁]_(c)-[Q₁-[S₂]_(d)]_(d)-[Q₂-[S₃]_(e)]_(e′)-[Q₃-[S₄]_(f)]_(f)—S₅—P

As used herein, the term “attached” means directly bonded to or indirectly bonded to through another group. Thus, for example, according to various non-limiting embodiments disclosed herein, L can be directly bonded to PC as a substituent on PC, or L can be a substituent on another group (such as a group represented by R, which is discussed below) that is directly bonded to PC (i.e., L is indirectly bonded to PC). Although not limiting herein, according to various non-limiting embodiments, L can be attached to PC so as to extend or lengthen PC in an activated state such that the absorption ratio of the extended PC (i.e., the photochromic compound) is enhanced as compared to PC alone. Although not limiting herein, according to various non-limiting embodiments, the location of attachment of L on PC can be chosen such that L lengthens PC in at least one of a direction parallel to or a direction perpendicular to a theoretical transitional dipole moment of the activated form of PC. Regarding the position of L, it may be subsequently attached to the photochromic compound at the location of the Q group. The photochromic compound of the present invention can have at least one Q group at the position(s) indicated and optionally one or more L groups. As used herein the term “theoretical transitional dipole moment” refers to transient dipolar polarization created by interaction of electromagnetic radiation with the molecule. See, for example, IUPAC Compendium of Chemical Technology, 2^(nd) Ed., International Union of Pure and Applied Chemistry (1997).

With reference to L above, each Q₁, Q₂, and Q₃ can be independently chosen for each occurrence from: a divalent group chosen from: an unsubstituted or a substituted aromatic group, an unsubstituted or a substituted alicyclic group, an unsubstituted or a substituted heterocyclic group, and mixtures thereof, wherein substituents are chosen from: a group represented by P, liquid crystal mesogens, halogen, poly(C₁-C₁₈ alkoxy), alkoxycarbonyl, alkylcarbonyl, C₁-C₁₈ alkoxycarbonyloxy, aryloxycarbonyloxy, perfluoro(C₁-C₁₈)alkoxy, perfluoro(C₁-C₁₈)alkoxycarbonyl, perfluoro(C₁-C₁₈)alkylcarbonyl, perfluoro(C₁-C₁₈)alkylamino, di-(perfluoro(C₁-C₁₈)alkyl)amino, perfluoro(C₁-C₁₈)alkylthio, C₁-C₁₈ alkylthio, C₁-C₁₈ acetyl, C₃-C₁₀ cycloalkyl, C₃-C₁₀ cycloalkoxy, a straight-chain or branched C₁-C₁₈ alkyl group that is mono-substituted with cyano, halo, or C₁-C₁₈ alkoxy, or poly-substituted with halo, and a group comprising one of the following formulae: -M(T)_((t−1)) and -M(OT)_((t−1)), wherein M is chosen from aluminum, antimony, tantalum, titanium, zirconium and silicon, T is chosen from organofunctional radicals, organofunctional hydrocarbon radicals, aliphatic hydrocarbon radicals and aromatic hydrocarbon radicals, and t is the valence of M. As used herein, the prefix “poly” means at least two.

As discussed above, Q₁, Q₂, and Q₃ can be independently chosen for each occurrence from a divalent group, such as an unsubstituted or a substituted aromatic group, unsubstituted or substituted heterocyclic group, and an unsubstituted or substituted alicylic group. Non-limiting examples of useful aromatic groups include: benzo, naphtho, phenanthro, biphenyl, tetrahydro naphtho, terphenyl, and anthraceno.

As used herein the term “heterocyclic group” means a compound having a ring of atoms, wherein at least one atom forming the ring is different than the other atoms forming the ring. Further, as used herein, the term heterocyclic group specifically excludes fused heterocyclic groups. Non-limiting examples of suitable heterocyclic groups from which a_(l), Q₂, and Q₃ can be chosen include: isosorbitol, dibenzofuro, dibenzothieno, benzofuro, benzothieno, thieno, furo, dioxino, carbazolo, anthranilyl, azepinyl, benzoxazolyl, diazepinyl, dioazlyl, imidazolidinyl, imidazolyl, imidazolinyl, indazolyl, indoleninyl, indolinyl, indolizinyl, indolyl, indoxazinyl, isobenzazolyl, isoindolyl, isooxazolyl, isooxazyl, isopyrroyl, isoquinolyl, isothiazolyl, morpholino, morpholinyl, oxadiazolyl, oxathiazolyl, oxathiazyl, oxathiolyl, oxatriazolyl, oxazolyl, piperazinyl, piperazyl, piperidyl, purinyl, pyranopyrrolyl, pyrazinyl, pyrazolidinyl, pyrazolinyl, pyrazolyl, pyrazyl, pyridazinyl, pyridazyl, pyridyl, pyrimidinyl, pyrimidyl, pyridenyl, pyrrolidinyl, pyrrolinyl, pyrroyl, quinolizinyl, quinuclidinyl, quinolyl, thiazolyl, triazolyl, triazyl, N-arylpiperazino, aziridino, arylpiperidino, thiomorpholino, tetrahydroquinolino, tetrahydroisoquinolino, pyrryl, unsubstituted, mono- or di-substituted C₄-C₁₈ spirobicyclic amines, and unsubstituted, mono- or di-substituted C₄-C₁₈ spirotricyclic amines.

As discussed above, according to various non-limiting embodiments Q₁, Q₂, and Q₃ can be chosen from mono- or di-substituted C₄-C₁₈ spirobicyclic amine and C₄-C₁₈ spirotricyclic amine. Non-limiting examples of suitable substituents include aryl, C₁-C₆ alkyl, C₁-C₆ alkoxy or phenyl (C₁-C₆)alkyl. Specific non-limiting examples of mono- or di-substituted spirobicyclic amines include: 2-azabicyclo[2.2.1]hept-2-yl; 3-azabicyclo[3.2.1]oct-3-yl; 2-azabicyclo[2.2.2]oct-2-yl; and 6-azabicyclo[3.2.2]nonan-6-yl. Specific non-limiting examples of mono- or di-substituted tricyclic amines include: 2-azatricyclo[3.3.1.1(3,7)]decan-2-yl; 4-benzyl-2-azatricyclo [3.3.1.1 (3,7)]decan-2-yl; 4-methoxy-6-methyl-2-azatricyclo[3.3.1.1 (3,7)]decan-2-yl; 4-azatricyclo[4.3.1.1 (3,8)]undecan-4-yl; and 7-methyl-4-azatricyclo[4.3.1.1 (3,8)]undecan-4-yl.

Examples of alicyclic groups from which Q₁, Q₂, and Q₃ can be chosen include, without limitation, cyclohexyl, cyclopropyl, norbornenyl, decalinyl, adamantanyl, bicyclooctane, per-hydrofluorene, and cubanyl.

With continued reference to L, each S₁, S₂, S₃, S₄, and S₅ is independently chosen for each occurrence from a spacer unit chosen from:

-   -   (1) —(CH₂)_(g)—, —(CF₂)_(h)—, —Si(CH₂)_(g)—,         —(Si[(CH₃)_(2])O)h—, wherein g is independently chosen for each         occurrence from 1 to 20; h is chosen from 1 to 16 inclusive;     -   (2) —N(Z)—, —C(Z)=C(Z)—, —C(Z)=N—, —C(Z′)—C(Z′)—, or a single         bond, wherein Z is independently chosen for each occurrence from         hydrogen, C₁-C₆ alkyl, C₃-C₁₀ cycloalkyl and aryl, and Z′ is         independently chosen for each occurrence from C₁-C₁₈ alkyl,         C₃-C₁₀ cycloalkyl and aryl; and     -   (3) —O—, —C(O)—, —N≡N—, —S—, —S(O)—, —S(O)(O)—, —(O)S(O)O—,         —O(O)S(O)O— straight-chain or branched C₁-C₂₄ alkylene residue,         said C₁-C₂₄ alkylene residue being unsubstituted,         mono-substituted by cyano or halo, or poly-substituted by halo;         provided that when two spacer units comprising heteroatoms are         linked together the spacer units are linked so that heteroatoms         are not directly linked to each other and when S₁ and S₅ are         linked to PC and P, respectively, they are linked so that two         heteroatoms are not directly linked to each other. As used         herein the term “heteroatom” means atoms other than carbon or         hydrogen.

According to various non-limiting embodiments disclosed herein, in L, c, d, e, and f each can be independently chosen from an integer ranging from 1 to 20, inclusive; and d′, e′ and f each can be independently chosen from 0, 1, 2, 3, and 4, provided that the sum of d′+e′ +f′ is at least 1. According to other non-limiting embodiments disclosed herein, c, d, e, and f each can be independently chosen from an integer ranging from 0 to 20, inclusive; and d′, e′ and f′ each can be independently chosen from 0, 1, 2, 3, and 4, provided that the sum of d′+e′+f′ is at least 2. According to still other non-limiting embodiments disclosed herein, c, d, e, and f each can be independently chosen from an integer ranging from 0 to 20, inclusive; and d′, e′ and f each can be independently chosen from 0, 1, 2, 3, and 4, provided that the sum of d′+e′+f′ is at least 3. According to still other non-limiting embodiments disclosed herein, c, d, e, and f each can be independently chosen from an integer ranging from 0 to 20, inclusive; and d′, e′ and f each can be independently chosen from 0, 1, 2, 3, and 4, provided that the sum of d′+e′+f′ is at least 1.

Further, in L, P can be chosen from: hydroxy, amino, C₂-C₁₈ alkenyl, C₂-C₁₈ alkynyl, azido, silyl, siloxy, silylhydride, (tetrahydro-2H-pyran-2-yl)oxy, thio, isocyanato, thioisocyanato, acryloyloxy, methacryloyloxy, 2-(acryloyloxy)ethylcarbamyl, 2-(methacryloyloxy) ethylcarbamyl, aziridinyl, allyloxycarbonyloxy, epoxy, carboxylic acid, carboxylic ester, acryloylamino, methacryloylamino, aminocarbonyl, C₁-C₁₈ alkyl aminocarbonyl, aminocarbonyl(C₁-C₁₈)alkyl, C₁-C₁₈ alkyloxycarbonyloxy, halocarbonyl, hydrogen, aryl, hydroxy(C₁-C₁₈)alkyl, C₁-C₁₈ alkyl, C₁-C₁₈ alkoxy, amino(C₁-C₁₈)alkyl, C₁-C₁₈ alkylamino, di-(C₁-C₁₈) alkylamino, alkyl(C₁-C₁₈)alkoxy, C₁-C₁₈ alkoxy(C₁-C₁₈)alkoxy, nitro, poly(C₁-C₁₈)alkyl ether, (C₁-C₁₈)alkyl(C₁-C₁₈)alkoxy(C₁-C₁₈)alkyl, polyethyleneoxy, polypropyleneoxy, ethylenyl, acryloyl, acryloyloxy(C₁-C₁₈)alkyl, methacryloyl, methacryloyloxy(C₁-C₁₈)alkyl, 2-chloroacryloyl, 2-phenylacryloyl, acryloyloxyphenyl, 2-chloroacryloylamino, 2-phenylacryloylaminocarbonyl, oxetanyl, glycidyl, cyano, isocyanato(C₁-C₁₈)alkyl, itaconic acid ester, vinyl ether, vinyl ester, a styrene derivative, main-chain and side-chain liquid crystal polymers, siloxane derivatives, ethyleneimine derivatives, maleic acid derivatives, fumaric acid derivatives, unsubstituted cinnamic acid derivatives, cinnamic acid derivatives that are substituted with at least one of methyl, methoxy, cyano and halogen, or substituted or unsubstituted chiral or non-chiral monovalent or divalent groups chosen from steroid radicals, terpenoid radicals, alkaloid radicals and mixtures thereof, wherein the substituents are independently chosen from C₁-C₁₈ alkyl, C₁-C₁₈ alkoxy, amino, C₃-C₁₀ cycloalkyl, C₁-C₁₈ alkyl(C₁-C₁₈)alkoxy, fluoro(C₁-C₁₈)alkyl, cyano, cyano(C₁-C₁₈)alkyl, cyano(C₁-C₁₈)alkoxy or mixtures thereof, or P is a structure having from 2 to 4 reactive groups or P is an unsubstituted or substituted ring opening metathesis polymerization precursor.

According to various non-limiting embodiments disclosed herein, when P is a polymerizable group, the polymerizable group can be any functional group adapted to participate in a polymerization reaction. Non-limiting examples of polymerization reactions include those described in the definition of “polymerization” in Hawley's Condensed Chemical Dictionary Thirteenth Edition, 1997, John Wiley & Sons, pages 901-902, which disclosure is incorporated herein by reference. For example, although not limiting herein, polymerization reactions include: “addition polymerization,” in which free radicals are the initiating agents that react with the double bond of a monomer by adding to it on one side at the same time producing a new free electron on the other side; “condensation polymerization,” in which two reacting molecules combine to form a larger molecule with elimination of a small molecule, such as a water molecule; and “oxidative coupling polymerization.” Further, non-limiting examples of polymerizable groups include hydroxy, acryloxy, methacryloxy, 2-(acryloxy)ethylcarbamyl, 2-(methacryloxy)ethylcarbamyl, isocyanate, aziridine, allylcarbonate, and epoxy, e.g., oxiranylmethyl.

According to one specific, non-limiting embodiment, P can be chosen from a main-chain or a side-chain liquid crystal polymer and a liquid crystal mesogen. As used herein, the term liquid crystal “mesogen” means rigid rod-like or disc-like liquid crystal molecules. Further, as used herein the term “main-chain liquid crystal polymer” refers to a polymer having liquid crystal mesogens within the backbone (i.e., the main chain) structure of the polymer. As used herein the term “side-chain liquid crystal polymer” refers to a polymer having liquid crystal mesogens attached to the polymer at the side chains. Although not limiting herein, generally, the mesogens are made up of two or more aromatic rings that restrict the movement of a liquid crystal polymer. Examples of suitable rod-like liquid crystal mesogens include without limitation: substituted or unsubstituted aromatic esters, substituted or unsubstituted linear aromatic compounds, and substituted or unsubstituted terphenyls.

According to another specific, non-limiting embodiment, P can be chosen from a steroid radical, for example and without limitation, a cholesterolic compound.

As is discussed above, various non-limiting embodiments disclosed herein provide a photochromic compound comprising (a) a photochromic group (PC) and (b) at least one Q group at the position described herein and optionally at least one lengthening agent (L) (above) attached to PC.

In alternative embodiments, the photochromic compound may be represented by the following graphic formula I, II, III, IVA, IVB, V or VI:

-   -   wherein:         -   (A) each substituent Q independently comprises N₃, —CN,             —COOR′, —CCR′, —OCOR′—R′, —OCOOR′, —SR′, —OSO₂R′″, and/or             CONHR′, wherein each R′ comprises hydrogen, an unsubstituted             or substituted alkyl group having from 1 to 18 carbon atoms,             an unsubstituted or substituted aryl group, an unsubstituted             or substituted alkene or alkyne group having from 2 to 18             carbon atoms, wherein said substituents are chosen from halo             and hydroxyl and R′″ comprises CF₃ or a perfluorinated alkyl             group having from 2 to 18 carbon atoms;         -   (B) each i is an integer chosen from 0 to the total number             of available positions and each R is independently chosen             for each occurrence from:             -   (a) a group represented by B described hereinafter;             -   (b) —C(O)X₂₄, wherein X₂₄ is chosen from a lengthening                 agent L, hydroxy, C₁-C₁₈ alkyl, C₁-C₁₈ alkoxy, phenyl                 that is unsubstituted or mono-substituted with C₁-C₁₈                 alkyl or C₁-C₁₈ alkoxy, amino that is unsubstituted,                 mono- or di-substituted with at least one of C₁-C₁₈                 alkyl, phenyl, benzyl, and naphthyl;             -   (c) —OX₇ and N(X₇)₂; wherein X₇ is chosen from:                 -   (i) a lengthening agent L, hydrogen, C₁-C₁₈ alkyl,                     C₁-C₁₈ acyl, phenyl(C₁-C₁₈) alkyl, mono(C₁-C₁₈)alkyl                     substituted phenyl(C₁-C₁₈)alkyl, mono(C₁-C₁₈)alkoxy                     substituted phenyl(C₁-C₁₈)alkyl; C₁-C₁₈                     alkoxy(C₁-C₁₈)alkyl; C₃-C₁₀ cycloalkyl;                     mono(C₁-C₁₈)alkyl substituted C₃-C₁₀ cycloalkyl,                     C₁-C₁₈ haloalkyl, allyl, benzoyl, mono-subsituted                     benzoyl, naphthoyl or mono-substituted naphthoyl,                     wherein each of said benzoyl and naphthoyl                     substituents are independently chosen from C₁-C₁₈                     alkyl, and C₁-C₁₈ alkoxy;                 -   (ii) —CH(X₈)X₃, wherein X₈ is chosen from a                     lengthening agent L, hydrogen or C₁-C₁₈ alkyl; and                     X₉ is chosen from a lengthening agent L, —CN, —CF₃,                     or —COOX₁₀, wherein λio is chosen from a lengthening                     agent L, hydrogen or C₁-C₁₈ alkyl;                 -   (iii) C(O)X₆, wherein X₆ is chosen from at least one                     of: a lengthening agent L, hydrogen, C₁-C₁₈ alkoxy,                     phenoxy that is unsubstituted, mono- or                     di-substituted with C₁-C₁₈ alkyl or C₁-C₁₈ alkoxy,                     an aryl group that is unsubstituted, mono- or                     di-substituted with C₁-C₁₈ alkyl or C₁-C₁₈ alkoxy,                     an amino group that is unsubstituted, mono- or                     di-substituted with C₁-C₁₈ alkyl, and a phenylamino                     group that is unsubstituted, mono- or di-substituted                     with C₁-C₁₈ alkyl or C₁-C₁₈ alkoxy; or                 -   (iv) tri(C₁-C₁₈)alkylsilyl,                     tri(C₁-C₁₈)alkylsilyloxy, tri(C₁-C₁₈)alkoxysilyl,                     tri(C₁-C₁₈) alkoxysilyloxy, di(C₁-C₁₈)alkyl(C₁-C₁₈                     alkoxy)silyl, di(C₁-C₁₈)alkyl(C₁-C₁₈                     alkoxy)silyloxy, di(C₁-C₁₈)alkoxy(C₁-C₁₈ alkyl)silyl                     or di(C₁-C₁₈)alkoxy(C₁-C₁₈ alkyl)silyloxy;             -   (d) —SX₁₁; wherein X₁₁ is chosen from a lengthening                 agent L, hydrogen, C₁-C₁₈ alkyl, C₁-C₁₈ haloalkyl, an                 aryl group that is unsubstituted, or mono- or                 di-substituted with C₁-C₁₈ alkyl, C₁-C₁₈ alkoxy, or                 halogen;             -   (e) a nitrogen containing ring represented by Formula i:

-   -   wherein         -   (i) n is an integer chosen from 0, 1, 2, and 3, provided             that if n is 0, U′ is U, and each U is independently chosen             for each occurrence from CH₂—, —CH(X₁₂)—, —C(X₁₂)₂₋,             —CH(X₁₃)₂—, —O(X₁₃)₂—, and —C(X₁₂)(X₁₃)—, wherein X₁₂ is             chosen from a lengthening agent L and C₁-C₁₂ alkyl, and X₁₃             is chosen from a lengthening agent L, phenyl and naphthyl,             and         -   (ii) U′ is chosen from U, —O—, —S—, —S(O)—, —NH—, —N(X₁₂)—             or N(X₁₃)—, and m is an integer chosen from 1, 2, and 3;         -   (f) the group represented by Formula ii or iii;

-   -   wherein X₁₄, X₁₅, and X₁₆ are independently chosen for each         occurrence from a lengthening agent L, hydrogen, C₁-C₁₈ alkyl,         phenyl or naphthyl, or X₁₄ and X₁₅ together form a ring of 5 to         8 carbon atoms; p is an integer chosen from 0, 1, or 2, and X₁₇         is independently chosen for each occurrence from a lengthening         agent L, C₁-C₁₈ alkyl, C₁-C₁₈ alkoxy, or halogen;         -   (g) immediately adjacent R groups together form a group             represented by Formula vii, viii, or ix:

-   -   wherein         -   (i) W and W′ are independently chosen for each occurrence             from —O—, —N(X₇)—, —C(X₁₄)—, and —C(X₁₇)—;         -   (ii) X₁₄, X₁₅ and X₁₇, wherein X₁₄, and X₁₅ are             independently chosen for each occurrence from a lengthening             agent L, hydrogen, C₁-C₁₈ alkyl, phenyl or naphthyl, or X₁₄             and X₁₅ together form a ring of 5 to 8 carbon atoms; and X₁₇             is independently chosen for each occurrence from a             lengthening agent L, C₁-C₁₈ alkyl, C₁-C₁₈ alkoxy, or             halogen; and         -   (iii) q is an integer chosen from 0, 1, 2, 3, and 4; and     -   (h) a lengthening agent L represented by:         —[S₁]_(c)-[Q₁-[S₂]_(d)]_(d′)-[Q₂-[S₃]_(e)]_(e′)-[Q₃-[S₄]_(f)]_(f′)—S₅—P         wherein:         -   (i) each Q₁, Q₂, and Q₃ is independently chosen for each             occurrence from: a divalent group chosen from: an             unsubstituted or a substituted aromatic group, an             unsubstituted or a substituted alicyclic group, an             unsubstituted or a substituted heterocyclic group, and             mixtures thereof, wherein substituents are chosen from: a             group represented by P, liquid crystal mesogens, halogen,             poly(C₁-C₁₈ alkoxy), C₁-C₁₈ alkoxycarbonyl, C₁-C₁₈             alkylcarbonyl, C₁-C₁₈ alkoxycarbonyloxy, aryloxycarbonyloxy,             perfluoro(C₁-C₁₈)alkoxy, perfluoro(C₁-C₁₈)alkoxycarbonyl,             perfluoro(C₁-C₁₈)alkylcarbonyl, perfluoro(C₁-C₁₈)alkylamino,             di-(perfluoro(C₁-C₁₈)alkyl)amino,             perfluoro(C₁-C₁₈)alkylthio, C₁-C₁₈ alkylthio, C₁-C₁₈ acetyl,             C₃-C₁₀ cycloalkyl, C₃-C₁₀ cycloalkoxy, a straight-chain or             branched C₁-C₁₈ alkyl group that is mono-substituted with             cyano, halo, or C₁-C₁₈ alkoxy, or poly-substituted with             halo, and a group comprising one of the following formulae:             -M(T)_((t−1)) and -M(OT)_((t−1)), wherein M is chosen from             aluminum, antimony, tantalum, titanium, zirconium and             silicon, T is chosen from organofunctional radicals,             organofunctional hydrocarbon radicals, aliphatic hydrocarbon             radicals and aromatic hydrocarbon radicals, and t is the             valence of M;         -   (ii) c, d, e, and f are each independently chosen from an             integer ranging from 0 to 20, inclusive; and each S₁, S₂,             S₃, S₄, and S₅ is independently chosen for each occurrence             from a spacer unit chosen from:             -   (1) —(CH₂)_(g)—, —(CF₂)_(h)—, —Si(CH₂)₉—,                 —(Si[(CH₃)₂]O)_(h)—, wherein g is independently chosen                 for each occurrence from 1 to 20; h is a whole number                 from 1 to 16 inclusive;             -   (2) —N(Z)—, —C(Z)═C(Z)—, —C(Z)═N—, —C(Z′)—C(Z′)— or a                 single bond, wherein Z is independently chosen for each                 occurrence from hydrogen, C₁-C₁₈ alkyl, C₃-C₁₀                 cycloalkyl and aryl, and Z′ is independently chosen for                 each occurrence from C₁-C₁₈ alkyl, C₃-C₁₀ cycloalkyl and                 aryl; and             -   (3) —O—, —C(O)—, —N═N—, —S—, —S(O)—, —S(O)(O)—,                 —(O)S(O)—, —(O)S(O)O—, —O(O)S(O)O—, or straight-chain or                 branched C₁-C₂₄ alkylene residue, said C₁-C₂₄ alkylene                 residue being unsubstituted, mono-substituted by cyano                 or halo, or poly-substituted by halo; provided that when                 two spacer units comprising heteroatoms are linked                 together the spacer units are linked so that heteroatoms                 are not directly linked to each other and when S₁ and S₅                 are linked to PC and P, respectively, they are linked so                 that two heteroatoms are not directly linked to each                 other;         -   (iii) P is chosen from: hydroxy, amino, C₂-C₁₈ alkenyl,             C₂-C₁₈ alkynyl, azido, silyl, siloxy, silylhydride,             (tetrahydro-2H-pyran-2-yl)oxy, thio, isocyanato,             thioisocyanato, acryloyloxy, methacryloyloxy,             2-(acryloyloxy)ethylcarbamyl, 2-(methacryloyloxy)             ethylcarbamyl, aziridinyl, allyloxycarbonyloxy, epoxy,             carboxylic acid, carboxylic ester, acryloylamino,             methacryloylamino, aminocarbonyl, C₁-C₁₈ alkyl             aminocarbonyl, aminocarbonyl(C₁-C₁₈)alkylene, C₁-C₁₈             alkyloxycarbonyloxy, halocarbonyl, hydrogen, aryl,             hydroxy(C₁-C₁₈)alkyl, C₁-C_(is) alkyl, C₁-C₁₈ alkoxy,             amino(C₁-C₁₈)alkylene, C₁-C₁₈ alkylamino,             di-(C₁-C₁₈)alkylamino, C₁-C₁₈ alkyl(C₁-C₁₈)alkoxy, C₁-C₁₈             alkoxy(C₁-C₁₈)alkoxy, nitro, poly(C₁-Cie)alkyl ether,             (C₁-C₁₈)alkyl(C₁-C₁₈)alkoxy(C₁-C₁₈)alkylene,             polyethyleneoxy, polypropyleneoxy, ethylenyl, acryloyl,             acryloyloxy(C₁-C₁₈) alkylene, methacryloyl,             methacryloyloxy(C₁-C₁₈)alkylene, 2-chloroacryloyl,             2-phenylacryloyl, acryloylphenylene, 2-chloroacryloylamino,             2-phenylacryloylamino-carbonyl, oxetanyl, glycidyl, cyano,             isocyanato(C₁-C₁₈)alkyl, itaconic acid ester, vinyl ether,             vinyl ester, a styrene derivative, main-chain and side-chain             liquid crystal polymers, siloxane derivatives, ethyleneimine             derivatives, maleic acid derivatives, fumaric acid             derivatives, unsubstituted cinnamic acid derivatives,             cinnamic acid derivatives that are substituted with at least             one of methyl, methoxy, cyano and halogen, or substituted or             unsubstituted chiral or non-chiral monovalent or divalent             groups chosen from steroid radicals, terpenoid radicals,             alkaloid radicals and mixtures thereof, wherein the             substituents are independently chosen from C₁-C₁₈ alkyl,             C₁-C₁₈ alkoxy, amino, C₃-C₁₀ cycloalkyl, C₁-C₁₈             alkyl(C₁-C₁₈)alkoxy, fluoro(C₁-C₁₈)alkyl, cyano,             cyano(C₁-C₁₈)alkyl, cyano(C₁-C₁₈)alkoxy or mixtures thereof,             or P is a structure having from 2 to 4 reactive groups or P             is an unsubstituted or substituted ring opening metathesis             polymerization precursor; and         -   (iv) d′, e′ and f′ are each independently chosen from 0, 1,             2, 3, and 4, provided that a sum of d′+e′+f′ is at least 1;     -   (C) provided that when said photochromic material is represented         by graphic formula I:         -   (a) Q comprises CN, and said photochromic material of             graphic formula I is substantially free of substituents at             the 12-position, or Q comprises —N₃, —COOR′, —CCR′,             —C(R′)C(R′)R′, —OCOOR′, —OCOOR′, —SR′, and 0SO₂R′″;         -   (b) the group A represents indeno, thiopheno,             benzothiopheno, furo or benzofuro; and         -   (c) B and B′ are each independently chosen from:             -   (i) hydrogen, C₁-C₁₈ alkyl, C₂-C₁-C₁₈ alkylidene,                 C₂-C₁-C₁₈ alkylidyne, vinyl, 03-010 cycloalkyl, C₁-C₁₈                 haloalkyl, allyl, halogen, and benzyl that is                 unsubstituted or mono-substituted with at least one of                 C₁-C₁₈ alkyl and C₁-C₁₈ alkoxy;             -   (ii) phenyl that is mono-substituted at the para                 position with at least one substituent chosen from:                 C₁-C₁₈ alkoxy, linear or branched chain C₁-C₂₀ alkylene,                 linear or branched chain C₁-C₄ polyoxyalkylene, cyclic                 C₁-C₂₀ alkylene, phenylene, naphthylene, C₁-C₁₈ alkyl                 substituted phenylene, mono- or poly-urethane(C₁-C₂₀)                 alkylene, mono- or poly-ester(C₁-C₂₀)alkylene, mono- or                 poly-carbonate(C₁-C₂₀) alkylene, polysilanylene,                 polysiloxanylene and mixtures thereof, wherein the at                 least one substituent is connected to an aryl group of a                 photochromic material;             -   (iii) —CH(CN)₂ and CH(COOX₁)₂, wherein X₁ is chosen from                 at least one of a lengthening agent L, hydrogen, C₁-C₁₈                 alkyl that is unsubstituted or mono-substituted with                 phenyl, phenyl(C₁-C₁₈)alkyl that is mono-substituted                 with C₁-C₁₈ alkyl, C₁-C₁₈ haloalkyl or C₁-C₁₈ alkoxy,                 and an aryl group that is unsubstituted, mono- or                 di-substituted, wherein each aryl substituent is                 independently chosen from C₁-C₁₈ alkyl and C₁-C₁₈                 alkoxy; and lengthening agent L;             -   (iv) —CH(X₂)(X₃), wherein:                 -   (1) X₂ is chosen from at least one of a lengthening                     agent L, hydrogen, C₁-C₁₈ alkyl, and an aryl group                     that is unsubstituted, mono- or di-substituted,                     wherein each aryl substituent is independently                     chosen from C₁-C₁₈ alkyl and C₁-C₁₈ alkoxy; and                 -   (2) X₃ is chosen from at least one of —COOX₁, —COX₁,                     —COX₄, and —CH₂OX₅, wherein: X₄ is chosen from at                     least one of morpholino, piperidino, amino that is                     unsubstituted, mono- or di-substituted with C₁-C₁₈                     alkyl, and an unsubstituted, mono or di-substituted                     group chosen from phenylamino and diphenylamino,                     wherein each substituent is independently chosen                     from C₁-C₁₈alkyl or C₁-C₁₈alkoxy; and X₅ is chosen                     from a lengthening agent L, hydrogen, —C(O)X₂,                     C₁-C₁₈ alkyl that is unsubstituted or                     mono-substituted with (C₁-C₁₈)alkoxy or phenyl,                     phenyl(C₁-C₁₈)alkyl that is mono-substituted with                     (C₁-C₁₈)alkoxy, and an aryl group that is                     unsubstituted, mono- or di-substituted, wherein each                     aryl substituent is independently chosen from                     C₁-C₁₈alkyl and C₁-C₁₈alkoxy;             -   (v) an unsubstituted, mono-, di-, or tri- substituted                 aryl group; 9-julolidinyl; or an unsubstituted, mono- or                 di-substituted heteroaromatic group chosen from pyridyl,                 furanyl, benzofuran-2-yl, benzofuran-3-yl, thienyl,                 benzothien-2-yl, benzothien-3-yl, dibenzofuranyl,                 dibenzothienyl, carbazoyl, benzopyridyl, indolinyl, or                 fluorenyl; wherein each aryl and heteroaromatic group                 substituent is independently chosen for each occurrence                 from:                 -   (1) a lengthening agent L;                 -   (2) —COOX₁ or —C(O)X₆;                 -   (3) aryl, haloaryl, C₃-C₁₀ cycloalkylaryl, and an                     aryl group that is mono- or di-substituted with                     C₁-C₁₈ alkyl or C₁-C₁₈alkoxy;                 -   (4) C₁-015 alkyl, C₃-C₁₀cycloalkyl, C₃-C₁₀                     cycloalkyloxy(C₁-C₁₈)alkyl, aryl(C₁-C₁₈)alkyl,                     aryloxy(C₁-C₁₈)alkyl, mono- or di-                     (C₁-C₁₅)alkylaryl(C₁-C₁₈)alkyl, mono- or                     di-(C₁-C₁₈)alkoxyaryl(C₁-C₁₈)alkyl, C₁-015                     haloalkyl, and mono(C₁-C₁₈)alkoxy(C₁-C₁₈) alkyl;                 -   (5) C₁-C₁₈ alkoxy, C₃-C₁₀ cycloalkoxy,                     cycloalkyloxy(C₁-C₁₈)alkoxy, aryl(C₁-C₁₈)alkoxy,                     aryloxy(C₁-C₁₈)alkoxy, mono- or                     di-(C₁-C₁₈)alkylaryl(C₁-C₁₈)alkoxy, and mono- or                     di-(C₁-C₁₈)alkoxyaryl(C₁-C₁₈)alkoxy;                 -   (6) aminocarbonyl, aminocarbonyl(C₁-C₁₈)alkylene,                     amino, mono- or di-alkylamino, diarylamino,                     piperazino, N—(C₁-C₁₈)alkylpiperazino,                     N-arylpiperazino, aziridino, indolino, piperidino,                     morpholino, thiomorpholino, tetrahydroquinolino,                     tetrahydroisoquinolino, pyrrolidyl, hydroxy,                     acryloxy, methacryloxy, and halogen;                 -   (7) —OX₇ or N(X₇)₂;                 -   (8) —SX₁₁;                 -   (9) a nitrogen containing ring represented by                     Formula i;                 -   (10) a group represented by Formula ii or iii;                 -   (11) an unsubstituted or mono-substituted group                     chosen from pyrazolyl, imidazolyl, pyrazolinyl,                     imidazolinyl, pyrrolidinyl, phenothiazinyl,                     phenoxazinyl, phenazinyl, or acridinyl, wherein each                     substituent is independently chosen from a                     lengthening agent L, C₁-C₁₈ alkyl, C₁-C₁₈ alkoxy,                     phenyl, hydroxy, amino or halogen;                 -   (12) a group represented by Formula iv or v:

-   -   -   -   wherein:             -   (I) V′ is independently chosen in each formula from —O—,                 —CH—, C₁-C₆ alkylene, and C₃-C₁₀ cycloalkylene,             -   (II) V is independently chosen in each formula from —O—                 or —N(X₂₁)—, wherein X₂₁ is a lengthening agent L,                 hydrogen, C₁-C₁₈ alkyl, and C₂-C₁₈ acyl, provided that                 if V is —N(X₂₁)—, V′ is —CH₂—,             -   (III) X₁₈ and X₁₉ are each independently chosen from a                 lengthening agent L, hydrogen and C₁-C₁₈ alkyl, and             -   (IV) k is chosen from 0, 1, and 2, and each X₂₀ is                 independently chosen for each occurrence from a                 lengthening agent L, C₁-C₁₈ alkyl, C₁-C₁₈ alkoxy,                 hydroxy and halogen;                 -   (13) a group represented by Formula vi:

-   -   -   wherein             -   (I) X₂₂ is chosen from a lengthening agent L, hydrogen                 and C₁-C₁₈ alkyl, and             -   (II) X₂₃ is chosen from a lengthening agent L and an                 unsubstituted, mono-, or di-substituted group chosen                 from naphthyl, phenyl, furanyl and thienyl, wherein each                 substituent is independently chosen for each occurrence                 from C₁-C₁₈ alkyl, C₁-C₁₈ alkoxy, and halogen; and                 -   (14) B and B′ together form fluoren-9-ylidene, mono-                     or di-substituted fluoren-9-ylidene, or a saturated                     C₃-C₁₂ spiro-monocyclic hydrocarbon ring, e.g.,                     cyclopropylidene, cyclobutylidene, cyclopentylidene,                     cyclohexylidene, cycloheptylidene, cyclooctylidene,                     cyclononylidene, cyclodecylidene cycloundecylidene,                     cyclododecylidene; saturated C₇-C₁₂ spiro-bicyclic                     hydrocarbon rings, e.g., bicyclo[2.2.1]heptylidene,                     i.e., norbornylidene, 1,7,7-trimethyl                     bicyclo[2.2.1]heptylidene, i.e., bornylidene,                     bicyclo[3.2.1]octylidene,                     bicyclo[3.3.1]nonan-9-ylidene,                     bicyclo[4.3.2]undecane; saturated C₇-C₁₂                     spiro-tricyclic hydrocarbon rings, e.g.,                     tricyclo[2.2.1.0^(2,6)]heptylidene,                     tricyclo[3.3.1.1^(3,7)]decylidene, i.e.,                     adamantylidene, and                     tricyclo[5.3.1.1^(2,6)]dodecyliden; and a                     lengthening agent L, said fluoren-9-ylidene                     substituents being selected from the group                     consisting of C₁-C₄ alkyl, C₁-C₄ alkoxy, bromo,                     fluoro and chloro;         -   (D) provided that when said photochromic material is             represented by graphic formula II, Q comprises —N₃ or             —OCOOR′ provided that said photochromic material of graphic             formula II is substantially free of substituents at the             5-position; and R, i, B and B′ are the same as stated             hereinbefore;         -   (E) provided that when said photochromic material is             represented by graphic formula III, Q independently             comprises for each occurrence, —N₃ or —OCOOR′; and R, B and             B′ are the same as hereinbefore;         -   (F) provided that when said photochromic material is             represented by graphic formula IVA or IVB, Q independently             comprises for each occurrence —N₃; or —CCR′, provided that             the indolino group is substantially free of N-substituents;             or —OSO₂R′″, provided that said photochromic material is             substantially free of carbonyl groups and each R″ is             independently chosen for each occurrence from hydrogen, a             substituted or unsubstituted alkyl, cycloalkyl, arylalkyl,             or together form cycloalkyl that is substituted or             unsubstituted; and R and i are the same as hereinbefore;         -   (G) provided that when said photochromic material is             represented by graphic formula V, Q comprises —N₃, —CN,             —CCR′, or —OSO₂R′″; and R, i, B and B′ are the same as             hereinbefore; and

    -   (H) provided that when said photochromic material is represented         by graphic formula VI, Q comprises: —N₃, —CN, —CCR′, or         —OSO₂R′″; E is —O— or —N(Q)—; and D is represented by the         following graphic formula:

wherein: T is —S—, —O— or —N(R)—, J is a spiro-alicyclic ring and Q is the same as described hereinbefore.

According to one specific, non-limiting embodiment, wherein the photochromic group comprises at least two PCs, the PCs can be linked to one another via linking group substituents on the individual PCs. For example, the PCs can be polymerizable photochromic groups or photochromic groups that are adapted to be compatible with a host material (“compatibilized photochromic group”). Non-limiting examples of polymerizable photochromic groups from which PC can be chosen and that are useful in conjunction with various non-limiting embodiments disclosed herein are disclosed in U.S. Pat. No. 6,113,814, which is hereby specifically incorporated by reference herein. Non-limiting examples of compatibilized photochromic groups from which PC can be chosen and that are useful in conjunction with various non-limiting embodiments disclosed herein are disclosed in U.S. Pat. No. 6,555,028, which is hereby specifically incorporated by reference herein.

Other suitable photochromic groups and complementary photochromic groups are described in U.S. Pat. Nos. 6,080,338 at column 2, line 21 to column 14, line 43; U.S. Pat. No. 6,136,968 at column 2, line 43 to column 20, line 67; U.S. Pat. No. 6,296,785 at column 2, line 47 to column 31, line 5; U.S. Pat. No. 6,348,604 at column 3, line 26 to column 17, line 15; U.S. Pat. No. 6,353,102 at column 1, line 62 to column 11, line 64; and U.S. Pat. No. 6,630,597 at column 2, line 16 to column 16, line 23; the disclosures of the aforementioned patents are incorporated herein by reference.

Another non-limiting embodiment provides the aforementioned lengthening agent (L) attached to the at least one photochromic group, wherein the at least one lengthening agent is chosen from one of the following compounds listed (and graphically represented) below:

Another non-limiting embodiment disclosed herein provides a photochromic compound of graphic formula I represented by the following graphic formula:

Additionally, according to various non-limiting embodiments disclosed herein, the photochromic compound represented by Formulas I, II, Ill, IVA, IVB, V and VI may comprise one or more lengthening agents (L). As previously discussed, in L, c, d, e, and f each can be independently chosen from an integer ranging from 1 to 20, inclusive; and d′, e′ and f′ each can be independently chosen from 0, 1, 2, 3, and 4, provided that the sum of d′+e′+f is at least 1. According to other non-limiting embodiments disclosed herein, c, d, e, and f each can be independently chosen from an integer ranging from 0 to 20, inclusive; and d′, e′ and f each can be independently chosen from 0, 1, 2, 3, and 4, provided that the sum of d′+e′+f is at least 2. According to still other non-limiting embodiments disclosed herein, c, d, e, and f each can be independently chosen from an integer ranging from 0 to 20, inclusive; and d′, e′ and f each can be independently chosen from 0, 1, 2, 3, and 4, provided that the sum of d′+e′+f is at least 3. According to still other non-limiting embodiments disclosed herein, c, d, e, and f each can be independently chosen from an integer ranging from 0 to 20, inclusive; and d′, e′ and f each can be independently chosen from 0, 1, 2, 3, and 4, provided that the sum of d′+e′+f′ is at least 1.

Thus, for example, in Formulas I, II, Ill, IVA, IVB, V and VI, “i” can be at least 1 and at least one of the R groups can be a lengthening agent L. Additionally or alternatively, the photochromic compound can comprise at least one R group, at least one B group, or at least one B′ group that is substituted with a lengthening agent L. For example, although not limiting herein, in one non-limiting embodiment the photochromic compound can comprise a B group comprising a phenyl group that is mono-substituted with a lengthening agent L.

Moreover, although not limiting herein, according to various non-limiting embodiments disclosed herein, the lengthening agent (L) can be attached to a photochromic group (e.g., the pyran group of Formula I, II, Ill or V) at any available position such that L extends or lengthens the photochromic group in an activated state such that the absorption ratio of the extended photochromic group (i.e., the photochromic compound) is enhanced as compared to the unextended photochromic group. Thus, for example and without limitation, according to various non-limiting embodiments wherein the photochromic compound is represented by Formula I, II, Ill or V, L can be directly bonded to the pyran group, for example, wherein i is at least 1 and R is L, or it can be indirectly bonded to the pyran group, for example, as a substituent on an R group, B, or B′ group such that L extends the pyran group in an activated state such that the absorption ratio of the photochromic compound is enhanced as compared to the unextended pyran group.

Further, the photochromic compound according to various non-limiting embodiments disclosed herein and generally represented by Formula I, II, Ill, V and VI can have an average absorption ratio of at least 1.5 in an activated state as determined according to CELL METHOD. According to other non-limiting embodiments, the photochromic compound can have an average absorption ratio ranging from 4 to 20, 3 to 30, or 2.5 to 50 in an activated state as determined according to CELL METHOD. According to still other non-limiting embodiments, the photochromic compounds can have an average absorption ratio ranging from 1.5 to 50 in an activated state as determined according to CELL METHOD.

Reaction sequences for forming a photochromic compound according to various non-limiting embodiments disclosed herein having an L group are disclosed in Reaction Sequences A through J, K, M, N, P, Q, T in U.S. Pat. No. 7,342,112, which disclosure is incorporated herein by reference.

A general reaction scheme for preparing photochromic compounds represented by Formulas I, II, Ill, IVA, IVB, V and VI, is shown in FIG. 2. Starting with a photochromic compound having a hydroxyl group shown by Structure #1, or a photochromic compound of Structure #2 having triflate, as shown, or a halogen at the same position, photochromic compounds of Structures #3, 5, 6, 7, 8, 9, 10 and 11 having Q groups of —OSO₂R′″, —CN, —COOR′, —OCOOR′, OCOOR′, —CCR′, C(R′)C(R′)R′ and CON(R′)R′, respectively, can be prepared. Examples 1, 2, 3 and 5 were prepared following the general reaction scheme of FIG. 2.

The following abbreviations were used for the chemicals listed in the reaction schemes and examples described hereinafter:

-   -   DHP-3,4-dihydro-2H-pyran     -   DCC-dicyclohexylcarbodiimide     -   DMAP-4-dimethylaminopyridine     -   PPTS-pyridine p-toluenesulfonate     -   pTSA-p-toluenesulfonic acid     -   NMP-N-methyl pyrrolidone     -   THF-tetrahyrdofuran     -   KMnO₄-potassium permanganate     -   MeLi-methyl lithium     -   ppTs-pyridinium p-toluenesulfonate     -   (Tf)₂O-trifluoromethanesulfonic acid anhydride     -   Dppf-1,1′-bis(diphenylphosphino)ferrocene     -   Pd₂(dba)₃-tris(dibenzylideneacetone)dipalladium(O)     -   DIBAL-diisobutylaluminium hydride     -   t-BuOH-t-butanol     -   HOAc-acetic acid     -   PdCl₂(PPh₃)₂-bis(triphenylphosphine)palladium(II) chloride     -   Cul-copper iodide     -   PPh₃-triphenyl phosphine     -   (iPr)₂NH: diisopropyl amine     -   EtMgBr-ethyl magnesium bromide     -   Zn(OAc)₂-zinc acetate     -   Zn(CN)₂-Zinc cyanide

Another general reaction scheme for making Q-substituted naphthols and Q-substituted phenol intermediates for preparing photochromic compounds represented by Formulas I, II, III, IVA, IVB, and V, is shown in FIGS. 3 and 4. Starting with a naphthol or phenol of Structure #12 in FIG. 3, one example of which can be prepared following Steps 1-3 of Example 4, naphthols of Structures #13, 14, 15, 19 and 21 having Q groups of —N₃, —CCR′, —CR′C(R′)R′, —COOR′, —CON(R′)R′, respectively, can be prepared. Starting with a naphthol or phenol of Structure #12 in FIG. 4, naphthols of Structures #22, 24, 28, 29 and 30 having Q groups of —CN, —SR′, —OSO₂R′″, —OCOOR′, and —OCOR′, respectively, can be prepared. The Q-substituted naphthols and Q-substituted phenol intermediates prepared in the reaction schemes of FIGS. 3 and 4 can be used in a coupling reaction with appropriate propargyl alcohols, as known to those skilled in the art, and described for benzopyrans in Reaction C of U.S. Pat. No. 5,429,774 and for naphthopyrans in Reaction E of U.S. Pat. No. 5,458,814 and for indenonaphthopyrans in Reaction G of U.S. Pat. No. 7,262,295, the disclosures of these reactions are incorporated herein by reference. Examples 4, 6 and 7 were prepared following the general reaction schemes of FIGS. 3 and 4.

Another non-limiting embodiment provides a photochromic compound chosen from:

-   (a)     3-phenyl-3-(4-(4-methoxyphenylpiperazin-1-yl)phenyl)-13,13-dimethyl-6-methoxy-7-trifluoromethanesulfonyloxy-3H,13H-indeno[2′,3′:3,4]naphtho[1,2-b]pyran; -   (b)     3-phenyl-3-(4-(4-methoxyphenylpiperazin-1-yl)phenyl)-13,13-dimethyl-6-methoxy-7-cyano-3H,13H-indeno[2′,3′:3,4]naphtho[1,2-b]pyran; -   (c)     3-phenyl-3-(4-(4-methoxyphenylpiperazin-1-yl)phenyl)-13,13-dimethyl-6-methoxy-7-(2-hydroxy-2-methyl-3-butyn-4-yl)-indeno[2′,3′:3,4]naphtho[1,2-b]pyran; -   (d)     2-phenyl-2-[4-(4-methoxy-phenyl)-piperazin-1-yl]-phenyl-5-methoxycarbonyl-6-methyl-8-cyano-2H-naphtho[1,2-13]pyran; -   (e) 2,2-bis(4-methoxyphenyl)-5-methoxyethylcarbonyl-6-methyl     -8-vinyl-2H-naphtho[1,2-b]pyran; -   (f)     2,2-bis(4-methoxyphenyl)-5-methoxyethoxycarbonyl-6-methyl-8-hydroxycarbonyl-2H-naphtho[1,2-b     ]pyran; and -   (g) 2,2-bis(4-methoxyphenyl)-5-methoxyethylcarbonyl-     6-methyl-8-methoxycarbonyl-2H-naphtho-[1.2-b]pyran.

Also provided by the present invention is a naphthol represented by one of the following graphic formulae:

-   -   wherein:         -   (A) each substituent Q independently comprising —N₃, —CN,             —COOR′, —CCR′, —C(R′)C(R′)R′, —OCOOR′, —OCOOR′, —SR′,             —OSO₂R′″, and/or —CON(R′)R′, wherein each R′ independently             comprises hydrogen, an unsubstituted or substituted alkyl             group having from 1 to 18 carbon atoms, an unsubstituted or             substituted aryl group, an unsubstituted or substituted             alkene or alkyne group having from 2 to 18 carbon atoms,             wherein said substituents are chosen from halo and hydroxyl             and R′″ comprises —CF₃ or a perfluorinated alkyl group             having from 2 to 18 carbon atoms;         -   (B) each i is an integer chosen from 0 to the total number             of available positions and each R is independently chosen             for each occurrence from:             -   (a) hydrogen, C₁-C₁₈ alkyl, C₂-C₁₈ alkylidene, C₂-C₁₈                 alkylidyne, vinyl, C₃-C₁₀ cycloalkyl, C₁-C₁₈ haloalkyl,                 allyl, halogen, and benzyl that is unsubstituted or                 mono-substituted with at least one of C₁-C₁₈ alkyl and                 C₁-C₁₈ alkoxy;             -   (b) phenyl that is mono-substituted at the para position                 with at least one substituent chosen from: C₁-C₁₈                 alkoxy, linear or branched chain C₁-C₂₀ alkylene, linear                 or branched chain C₁-C₄ polyoxyalkylene, cyclic C₃-C₂₀                 alkylene, phenylene, naphthylene, C₁-C₁₈ alkyl                 substituted phenylene, mono- or poly-urethane(C₁-C₂₀)                 alkylene, mono- or poly-ester(C₁-C₂₀)alkylene, mono- or                 poly-carbonate (C₁-C₂₀)alkylene, polysilanylene,                 polysiloxanylene and mixtures thereof, wherein the at                 least one substituent is connected to an aryl group of a                 photochromic material;             -   (c) —CH(CN)₂ and —CH(COOX₁)₂, wherein X, is chosen from                 at least one of a lengthening agent L, hydrogen, C₁-C₁₈                 alkyl that is unsubstituted or mono-substituted with                 phenyl, phenyl(C₁-C₁₈)alkyl that is mono-substituted                 with C₁-C₁₈ alkyl, C₁-C₁₈ haloalkyl, or C₁-C₁₈ alkoxy,                 and an aryl group that is unsubstituted, mono- or                 di-substituted, wherein each aryl substituent is                 independently chosen from C₁-C₁₈ alkyl, C₁-C₁₈                 haloalkyl, lengthening agent L and C₁-C₁₈ alkoxy;         -   (d) —CH(X₂)(X₃), wherein:             -   (i) X₂ is chosen from at least one of a lengthening                 agent L, hydrogen, C₁-C₁₈ alkyl, and an aryl group that                 is unsubstituted, mono- or di-substituted, wherein each                 aryl substituent is independently chosen from C₁-C₁₈                 alkyl and C₁-C₁₈ alkoxy; and             -   (ii) X₃ is chosen from at least one of —COOX₁, —COX₁,                 —COX₄, and —CH₂OX₅, wherein:         -   (A) X₄ is chosen from at least one of morpholino,             piperidino, amino that is unsubstituted, mono- or             di-substituted with C₁-C₁₈ alkyl, and an unsubstituted, mono             or di-substituted group chosen from phenylamino and             diphenylamino, wherein each substituent is independently             chosen from C₁-C₁₈ alkyl or C₁-C₁₈ alkoxy; and         -   (B) X₅ is chosen from a lengthening agent L, hydrogen,             —C(O)X₂, C₁-C₁₈ alkyl that is unsubstituted or             mono-substituted with (C₁-C₁₈)alkoxy or phenyl,             phenyl(C₁-C₁₈)alkyl that is mono-substituted with             (C₁-C₁₈)alkoxy, and an aryl group that is unsubstituted,             mono- or di-substituted, wherein each aryl substituent is             independently chosen from C₁-C₁₈ alkyl and C₁-C₁₈ alkoxy;             -   (e) an unsubstituted, mono-, di-, or tri-substituted                 aryl group; 9-julolidinyl; or an unsubstituted, mono- or                 di-substituted heteroaromatic group chosen from pyridyl,                 furanyl, benzofuran-2-yl, benzofuran-3-yl, thienyl,                 benzothien-2-yl, benzothien-3-yl, dibenzofuranyl,                 dibenzothienyl, carbazoyl, benzopyridyl, indolinyl, and                 fluorenyl; wherein each aryl and heteroaromatic                 substituent is independently chosen for each occurrence                 from:                 -   (i) a lengthening agent L;                 -   (ii) —COOX₁ or —C(O)X₆, wherein X₆ is chosen from at                     least one of: a lengthening agent L, hydrogen,                     C₁-C₁₈ alkoxy, phenoxy that is unsubstituted, mono-                     or di-substituted with C₁-C₁₈ alkyl or C₁-C₁₈                     alkoxy, an aryl group that is unsubstituted, mono-                     or di-substituted with C₁-C₁₈ alkyl or C₁-C₁₈                     alkoxy, an amino group that is unsubstituted, mono-                     or di-substituted with C₁-C₁₈ alkyl, and a                     phenylamino group that is unsubstituted, mono- or                     di-substituted with C₁-C₁₈ alkyl or C₁-C₁₈ alkoxy;                 -   (iii) aryl, haloaryl, C₃-C₁₀ cycloalkylaryl, and an                     aryl group that is mono- or di-substituted with                     C₁-C₁₈ alkyl or C₁-C₁₈ alkoxy;                 -   (iv) C₁-C₁₈ alkyl, C₃-C₁₀ cycicalkyl, C₃-C₁₀                     cycloalkyloxy(C₁-C₁₈)alkyl, aryl(C₁-C₁₈)alkyl,                     aryloxy(C₁-C₁₈)alkyl, mono- or di-                     (C₁-C₁₈)alkylaryl(C₁-C₁₈)alkyl, mono- or                     di-(C₁-C₁₈)alkoxyaryl(C₁-C₁₈)alkyl, C₁-C₁₈                     haloalkyl, and mono(C₁-C₁₈)alkoxy(C₁-C₁₈)alkyl;                 -   (v) alkoxy, C₁-C₁₈ cycloalkoxy;                     cycloalkyloxy(C₁-C₁₈)alkoxy, aryl(C₁-C₁₈)alkoxy,                     aryloxy(C₁-C₁₈)alkoxy, mono- or di-(C₁-C₁₈)                     alkylaryl(C₁-C₁₈)alkoxy, and mono- or di-                     (C₁-C₁₈)alkoxyaryl(C₁-C₁₈)alkoxy;                 -   (vi) aminocarbonyl, aminocarbonyl(C₁-C₁₈)alkylene,                     amino, mono- or di-(C₁-C₁₈)alkylamino, diarylamino,                     piperazino, N-(C₁-C₁₈)alkylpiperazino,                     N-arylpiperazino, aziridino, indolino, piperidino,                     morpholino, thiomorpholino, tetrahydroquinolino,                     tetrahydroisoquinolino, pyrrolidyl, hydroxy,                     acryloxy, methacryloxy, and halogen;                 -   (vii) —OX₇ or —N(X₇)₂, wherein X₇ is chosen from:         -   (A) a lengthening agent L, hydrogen, C₁-C₁₈ alkyl, C₁-C₁₈             acyl, phenyl(C₁-C₁₈)alkyl, mono(C₁-C₁₈)alkyl substituted             phenyl(C₁-C₁₈) alkyl, mono(C₁-C₁₈)alkoxy substituted             phenyl(C₁-C₁₈)alkyl; C₁-C₁₈ alkoxy(C₁-C₁₈)alkyl; C₃-C₁₀             cycloalkyl; mono(C₁-C₁₈)alkyl substituted C₃-C₁₀ cycloalkyl,             C₁-C₁₈ haloalkyl, allyl, benzoyl, mono-subsituted benzoyl,             naphthoyl or mono-substituted naphthoyl, wherein each of             said benzoyl and naphthoyl substituents are independently             chosen from C₁-C₁₈ alkyl, and C₁-C₁₈ alkoxy;         -   (B) —CH(X₈)X₉, wherein X₈ is chosen from a lengthening agent             L, hydrogen or C₁-C₁₈ alkyl; and X₉ is chosen from a             lengthening agent L, —CN, —CF₃, or —OCOOX₁₀, wherein X₁₀ is             chosen from a lengthening agent L, hydrogen or C₁-C₁₈ alkyl;         -   (C) C(O)X_(6;) or         -   (D) tri(C₁-C₁₈)alkylsilyl, tri(C₁-C₁₈)alkylsilyloxy,             tri(C₁-C₁₈)alkoxysilyl, tri(C₁-C₁₈)alkoxysilyloxy,             di(C₁-C₁₈)alkyl(C₁-C₁₈ alkoxy)silyl, di(C₁-C₁₈)alkyl(C₁-C₁₈             alkoxy)silyloxy, di(C₁-C₁a)alkoxy(C₁-C₁₈ alkyl)silyl or             di(C₁-C₁₈)alkoxy(C₁-C₁₈ alkyl)silyloxy;             -   (viii) SX₁₁, wherein X₁₁ is chosen from a lengthening                 agent L, hydrogen, C₁-C₁₈ alkyl, C₁-C₁₈ haloalkyl, an                 aryl group that is unsubstituted, or mono- or                 di-substituted with C₁-C₁₈ alkyl, C₁-C₁₈ alkoxy, or                 halogen;             -   (ix) a nitrogen containing ring represented by Formula                 i:

-   -   -   -   -   wherein

        -   (A) n is an integer chosen from 0, 1, 2, and 3, provided             that if n is 0, U′ is U, and each U is independently chosen             for each occurrence from —CH₂—, —CH(X₁₂)—, —C(X₁₂)₂—, —CH             (X₁₃)—, —O(X₁₃)₂—, and —C(X₁₂)(X₁₃)—, wherein X₁₂ is chosen             from a lengthening agent L and C₁-C₁₈ alkyl, and X₁3 is             chosen from a lengthening agent L, phenyl and naphthyl, and

        -   (B) U′ is chosen from U, —O—, —S—, —S(O)—, —NH—, —N(X₁₂)— or             N(X₁₃)—, and m is an integer chosen from 1, 2, and 3, and             -   (x) a group represented by Formula ii or iii:

-   -   wherein X₁₄, X₁₅, and X₁₆ are independently chosen for each         occurrence from a lengthening agent L, hydrogen, C₁-C₁₈ alkyl,         phenyl or naphthyl, or X₁₄ and X₁₅ together form a ring of 5 to         8 carbon atoms; p is an integer chosen from 0, 1, or 2, and X₁₇         is independently chosen for each occurrence from a lengthening         agent L, C₁-C₁₈ alkyl, C₁-C₁₈ alkoxy, or halogen;         -   (f) an unsubstituted or mono-substituted group chosen from             pyrazolyl, imidazolyl, pyrazolinyl, imidazolinyl,             pyrrolidinyl, phenothiazinyl, phenoxazinyl, phenazinyl, or             acridinyl, wherein each substituent is independently chosen             from a lengthening agent L, C₁-C₁₈ alkyl, C₁-C₁₈ alkoxy,             phenyl, hydroxy, amino or halogen;         -   (g) a group represented by Formula iv or v:

-   -   wherein         -   (i) V′ is independently chosen in each formula from O—,             —CH—, C₁-C₆ alkylene, and C₃-C₁₀ cycloalkylene,         -   (ii) V is independently chosen in each formula from —O— or             N(X₂₁)—, wherein X₂₁ is from a lengthening agent L             represented by Formula I above, hydrogen, C₁-C₁₈ alkyl, and             O₂—C₁₈ acyl, provided that if V is N(X₂₁)—, V′ is —CH₂—,         -   (iii) X₁₈ and X₁₉ are each independently chosen from a             lengthening agent L, hydrogen and C₁-C₁₈ alkyl, and         -   (iv) k is chosen from 0, 1, and 2, and each X₂₀ is             independently chosen for each occurrence from a lengthening             agent L, C₁-C₁₈ alkyl, C₁-C₁₈ alkoxy, hydroxy and halogen;         -   (h) a group represented by Formula vi:

-   -   -   -   (i) X₂₂ is chosen from a lengthening agent L, hydrogen                 and C₁-C₁₈ alkyl, and             -   (ii) X₂₃ is chosen from a lengthening agent L and an                 unsubstituted, mono-, or di-substituted group chosen                 from aryl, furanyl and thienyl, wherein each substituent                 is independently chosen for each occurrence from C₁-C₁₈                 alkyl, C₁-C₁₈ alkoxy, and halogen;

        -   (i) C(O)X₂₄, wherein X₂₄ is chosen from a lengthening agent             L, hydroxy, C₁-C₁₈ alkyl, C₁-C₁₈ haloalkyl, C₁-C₁₈ alkoxy,             phenyl that is unsubstituted or mono-substituted with C₁-C₁8             alkyl or C₁-C₁₈ alkoxy, amino that is unsubstituted, mono-             or di-substituted with at least one of C₁-C₁₈ alkyl, aryl             and benzyl;

        -   (j) —COOX₁;

        -   (k) —OX₇ and —N(X₇)₂;

        -   (l) —SX₁₁;

        -   (m) the nitrogen containing ring represented by Formula i;

        -   (n) the group represented by one of Formula ii or iii;

        -   (o) a lengthening agent L represented by:             —[S₁]_(c)-[Q₁-[S₂]_(d)]_(d′)-[Q₂-[S₃]_(e)]_(e′)-[Q₃-[S₄]_(f)]_(f′)—S₅—P             wherein:             -   (i) each Q₁, Q₂, and Q₃ is independently chosen for each                 occurrence from: a divalent group chosen from: an                 unsubstituted or a substituted aromatic group, an                 unsubstituted or a substituted alicyclic group, an                 unsubstituted or a substituted heterocyclic group, and                 mixtures thereof, wherein substituents are chosen from:                 a group represented by P, liquid crystal mesogens,                 halogen, poly(C₁-C₁₈ alkoxy), C₁-C₁₈ alkoxycarbonyl,                 C₁-C₁₈ alkylcarbonyl, C₁-C₁₈ alkoxycarbonyloxy,                 aryloxycarbonyloxy, perfluoro(C₁-C₁₈)alkoxy,                 perfluoro(C₁-C₁₈)alkoxycarbonyl,                 perfluoro(C₁-C₁₈)alkylcarbonyl,                 perfluoro(C₁-C₁₈)alkylamino,                 di-(perfluoro(C₁-C₁₈)alkyl)amino,                 perfluoro(C₁-C₁₈)alkylthio, C₁-C₁₈ alkylthio, C₁-C₁₈                 acetyl, C₃-C₁₀ cycloalkyl, C₃-C₁₀ cycloalkoxy, a                 straight-chain or branched C₁-C₁₈ alkyl group that is                 mono-substituted with cyano, halo, or C₁-C₁₈ alkoxy, or                 poly-substituted with halo, and a group comprising one                 of the following formulae: -M(T)_((t−1)) and                 -M(OT)_((t−1)), wherein M is chosen from aluminum,                 antimony, tantalum, titanium, zirconium and silicon, T                 is chosen from organofunctional radicals,                 organofunctional hydrocarbon radicals, aliphatic                 hydrocarbon radicals and aromatic hydrocarbon radicals,                 and t is the valence of M;             -   (ii) c, d, e, and f are each independently chosen from                 an integer ranging from 0 to 20, inclusive; and each S₁,                 S₂, S₃, S₄, and S₅ is independently chosen for each                 occurrence from a spacer unit chosen from:                 -   (1) —(CH₂)_(g)—, —(CF₂)_(h)—, —Si(CH₂)_(g)—,                     —(Si[(CH₃)₂]O)_(h)—, wherein g is independently                     chosen for each occurrence from 1 to 20; h is a                     whole number from 1 to 16 inclusive;                 -   (2) —N(Z)—, —C(Z)═C(Z)—, —C(Z)═N—, —C(Z′)—C(Z′)— or                     a single bond, wherein Z is independently chosen for                     each occurrence from hydrogen, C₁-C₁₈ alkyl, C₃-C₁₀                     cycloalkyl and aryl, and Z′ is independently chosen                     for each occurrence from C₁-C₁₈ alkyl, C₃-C₁₀                     cycloalkyl and aryl; and                 -   (3) —O—, —C(O)—, —N═N—, —S—, —S(O)—, —S(O)(O)—,                     —(O)S(O)—, —(O)S(O)O—, —O(O)S(O)O—, or                     straight-chain or branched C₁-C₂₄ alkylene residue,                     said C₁-C₂₄ alkylene residue being unsubstituted,                     mono-substituted by cyano or halo, or                     poly-substituted by halo; provided that when two                     spacer units comprising heteroatoms are linked                     together the spacer units are linked so that                     heteroatoms are not directly linked to each other                     and when S₁ and S₅ are linked to PC and P,                     respectively, they are linked so that two                     heteroatoms are not directly linked to each other;             -   (iii) P is chosen from: hydroxy, amino, C₂-C₁₈ alkenyl,                 C₂-C₁₈ alkynyl, azido, silyl, siloxy, silylhydride,                 (tetrahydro-2H-pyran-2-yl)oxy, thio, isocyanato,                 thioisocyanato, acryloyloxy, methacryloyloxy,                 2-(acryloyloxy)ethylcarbamyl,                 2-(methacryloyloxy)ethylcarbamyl, aziridinyl,                 allyloxycarbonyloxy, epoxy, carboxylic acid, carboxylic                 ester, acryloylamino, methacryloylamino, aminocarbonyl,                 C₁-C₁₈ alkyl aminocarbonyl, aminocarbonyl(C₁-C₁₈)alkyl,                 C₁-C₁₈ alkyloxycarbonyloxy, halocarbonyl, hydrogen,                 aryl, hydroxy(C₁-C₁₈)alkyl, C₁-C₁₈ alkyl, C₁-C₁₈ alkoxy,                 amino(C₁-C₁₈)alkyl, C₁-C₁₈ alkylamino,                 di-(C₁-C₁₈)alkylamino, C₁-C₁₈ alkyl(C₁-C₁₈)alkoxy,                 C₁-C₁₈ alkoxy(C₁-C₁₈)alkoxy, nitro, poly(C₁-C₁₈)alkyl                 ether, (C₁-C₁₈)alkyl(C₁-C₁₈)alkoxy(C₁-C₁₈)alkyl,                 polyethyleneoxy, polypropyleneoxy, ethylenyl, acryloyl,                 acryloyloxy(C₁-C₁₈)alkylene, methacryloyl,                 methacryloyloxy(C₁-C₁₈)alkyl, 2-chloroacryloyl,                 2-phenylacryloyl, acryloyloxyphenyl,                 2-chloroacryloylamino, 2-phenylacryloylamino-carbonyl,                 oxetanyl, glycidyl, cyano, isocyanato(C₁-C₁₈)alkyl,                 itaconic acid ester, vinyl ether, vinyl ester, a styrene                 derivative, main-chain and side-chain liquid crystal                 polymers, siloxane derivatives, ethyleneimine                 derivatives, maleic acid derivatives, fumaric acid                 derivatives, unsubstituted cinnamic acid derivatives,                 cinnamic acid derivatives that are substituted with at                 least one of methyl, methoxy, cyano and halogen, or                 substituted or unsubstituted chiral or non-chiral                 monovalent or divalent groups chosen from steroid                 radicals, terpenoid radicals, alkaloid radicals and                 mixtures thereof, wherein the substituents are                 independently chosen from C₁-C₁₈ alkyl, C₁-C₁₈ alkoxy,                 amino, C₃-C₁₀ cycloalkyl, C₁-C₁₈ alkyl(C₁-C₁₈)alkoxy,                 fluoro(C₁-C₁₈)alkyl, cyano, cyano(C₁-C₁₈)alkyl,                 cyano(C₁-C₁₈)alkoxy or mixtures thereof, or P is a                 structure having from 2 to 4 reactive groups or P is an                 unsubstituted or substituted ring opening metathesis                 polymerization precursor; and             -   (iv) d′, e′ and f′ are each independently chosen from 0,                 1, 2, 3, and 4, provided that a sum of d′+e′+f′ is at                 least 1;

        -   (p) immediately adjacent R groups together form a group             represented by Formula vii, viii, or ix:

-   -   -   -   -   wherein

            -   (i) W and W′ are independently chosen for each                 occurrence from —O—, —N(X₇)—, —O(X₁₇)—,

            -   (ii) X₁₄, X₁₅ and X₁₇ are as set forth above, and

            -   (iii) q is an integer chosen from 0, 1, 2, 3, and 4; and

    -   (C) the group A represents indeno, thiopheno, benzothiopheno,         furo or benzofuro.

In particular embodiments of the present invention, the naphthol may be represented by one of the following graphic formulae:

-   -   wherein each substituent Q independently comprises —CN, —COOR′,         —CCR′, —C(R′)C(R′)R′, —OCOR′, —OCOOR′, —SR′, —OSO₂R′″, and/or         —CON(R′)R′, wherein each R′ independently comprises an alkyl         group having from 1 to 12 carbon atoms and R′″ comprises —CF₃ or         a perfluorinated alkyl group having from 2 to 12 carbon atoms         and the group A is indeno.

In another particular embodiment, the naphthol may be represented by the following graphic formula:

Further reaction schemes for preparing the naphthols of the present invention are described in FIGS. 5 and 6. In both reaction schemes, a group Q′ which can be converted into Q is used. Examples of Q′ include alkoxy and halogen groups. The conversion of Q′ into Q may occur at the naphthol or photochromic compound stage. In Example 4, Q′ is converted into Q at the naphthol stage and in Example 1, Q′ is converted into Q at the photochromic compound stage. FIG. 5 shows how substituted indeno-fused naphthols are prepared. The synthesis sequence starts from benzophenone of Structure #31, which has the desired substitutions (Q′ and R′) in place. Such materials are commercially available or prepared by methods known to those skilled in the art. A Stobbe reaction of Structure #31 with dimethyl succinate in the presence of potassium t-butoxide provides condensed product of Structure #32, which easily undergoes a ring closure reaction in acetic anhydride to form the naphthol of Structure #33. The naphthol can be further converted to indeno-fused naphthol of Structure #34 with various substitutions on the bridge carbon via various multistep reactions that can be found in U.S. Pat. Nos. 5,645,767; 5,869,658; 5,698,141; 5,723,072; 5,961,892; 6,113,814; 5,955,520; 6,555,028; 6,296,785; 6,555,028; 6,683,709; 6,660,727; 6,736,998; 7,008,568; 7,166,357; 7,262,295; and 7,320,826, which patents are incorporated herein by reference.

FIG. 6 shows how Q′ substituted naphthols are prepared in a similar manner as done in FIG. 5. Starting with the ketone of Structure #35, a Stobbe reaction of Structure #35 with dimethyl succinate in the presence of potassium t-butoxide provides condensed product of Structure #36, which easily undergoes a ring closure reaction in acetic anhydride to form the compound of Structure #37 which is further converted to the naphthol of Structure #38. Naphthols having Q′ substituents at various locations can be prepared using procedures known to those skilled in the art.

The thermally reversible photochromic compounds according to various non-limiting embodiments disclosed herein can be used in a variety of applications to provide photochromic and/or photochromic-dichroic properties.

One non-limiting embodiment provides a photochromic article comprising an organic host material and a photochromic composition of the present invention connected to at least a portion of the organic host material. As used herein the term “connected to” means in direct contact with an object or indirect contact with an object through one or more other structures or materials, at least one of which is in direct contact with the object. Further, according to this non-limiting embodiment, the photochromic compound can be connected to at least a portion of the host by incorporation into the host material or by application onto the host material, for example, as part of a coating or layer. In addition to the photochromic compound, the photochromic composition may further comprise at least one additive chosen from dyes, alignment promoters, kinetic enhancing additives, photoinitiators, thermal initiators, polymerization inhibitors, solvents, light stabilizers, heat stabilizers, mold release agents, rheology control agents, leveling agents, free radical scavengers, gelators and adhesion promoters.

Non-limiting examples of organic host materials that may be used in conjunction with various non-limiting embodiments disclosed herein include polymeric materials, for example, homopolymers and copolymers, prepared from the monomers and mixtures of monomers disclosed in U.S. Pat. No. 5,962,617 and in U.S. Pat. No. 5,658,501 from column 15, line 28 to column 16, line 17, the disclosures of which U.S. patents are specifically incorporated herein by reference, an oligomeric material, a monomeric material or a mixture or combination thereof. Polymeric materials can be thermoplastic or thermoset polymeric materials, can be transparent or optically clear, and can have any refractive index required. Non-limiting examples of such disclosed monomers and polymers include: polyol(allyl carbonate) monomers, e.g., allyl diglycol carbonates such as diethylene glycol bis(allyl carbonate), which monomer is sold under the trademark CR-39 by PPG Industries, Inc.; polyurea-polyurethane (polyurea-urethane) polymers, which are prepared, for example, by the reaction of a polyurethane prepolymer and a diamine curing agent, a composition for one such polymer being sold under the trademark TRIVEX by PPG Industries, Inc.; polyol(meth)acryloyl terminated carbonate monomer; diethylene glycol dimethacrylate monomers; ethoxylated phenol methacrylate monomers; diisopropenyl benzene monomers; ethoxylated trimethylol propane triacrylate monomers; ethylene glycol bismethacrylate monomers; poly(ethylene glycol) bismethacrylate monomers; urethane acrylate monomers; poly(ethoxylated bisphenol A dimethacrylate); poly(vinyl acetate); poly(vinyl alcohol); poly(vinyl chloride); poly(vinylidene chloride); polyethylene; polypropylene; polyurethanes; polythiourethanes; thermoplastic polycarbonates, such as the carbonate-linked resin derived from bisphenol A and phosgene, one such material being sold under the trademark LEXAN; polyesters, such as the material sold under the trademark MYLAR; poly(ethylene terephthalate); polyvinyl butyral; poly(methyl methacrylate), such as the material sold under the trademark PLEXIGLAS, and polymers prepared by reacting polyfunctional isocyanates with polythiols or polyepisulfide monomers, either homopolymerized or co-and/or terpolymerized with polythiols, polyisocyanates, polyisothiocyanates and optionally ethylenically unsaturated monomers or halogenated aromatic-containing vinyl monomers. Also contemplated are copolymers of such monomers and blends of the described polymers and copolymers with other polymers, for example, to form block copolymers or interpenetrating network products.

According to one specific non-limiting embodiment, the organic host material is chosen from polyacrylates, polymethacrylates, poly(C₁-C₁₂) alkyl methacrylates, polyoxy(alkylene methacrylates), poly (alkoxylated phenol methacrylates), cellulose acetate, cellulose triacetate, cellulose acetate propionate, cellulose acetate butyrate, poly(vinyl acetate), poly(vinyl alcohol), poly(vinyl chloride), poly(vinylidene chloride), poly(vinylpyrrolidone), poly((meth)acrylamide), poly(dimethyl acrylamide), poly(hydroxyethyl methacrylate), poly((meth)acrylic acid), thermoplastic polycarbonates, polyesters, polyurethanes, polythiourethanes, poly(ethylene terephthalate), polystyrene, poly(alpha methylstyrene), copoly(styrene-methylmethacrylate), copoly(styrene-acrylonitrile), polyvinylbutyral and polymers of members of the group consisting of polyol(allyl carbonate)monomers, mono-functional acrylate monomers, mono-functional methacrylate monomers, polyfunctional acrylate monomers, polyfunctional methacrylate monomers, diethylene glycol dimethacrylate monomers, diisopropenyl benzene monomers, alkoxylated polyhydric alcohol monomers and diallylidene pentaerythritol monomers.

According to another specific non-limiting embodiment, the organic host material is a homopolymer or copolymer of monomer(s) chosen from acrylates, methacrylates, methyl methacrylate, ethylene glycol bis methacrylate, ethoxylated bisphenol A dimethacrylate, vinyl acetate, vinylbutyral, urethane, thiourethane, diethylene glycol bis(allyl carbonate), diethylene glycol dimethacrylate, diisopropenyl benzene, and ethoxylated trimethylol propane triacrylate. The polymeric material most often comprises self-assembling materials, polycarbonate, polyamide, polyimide, poly(meth)acrylate, polycyclic alkene, polyurethane, poly(urea)urethane, polythiourethane, polythio(urea)urethane, polyol(allyl carbonate), cellulose acetate, cellulose diacetate, cellulose triacetate, cellulose acetate propionate, cellulose acetate butyrate, polyalkene, polyalkylene-vinyl acetate, poly(vinylacetate), poly(vinyl alcohol), poly(vinyl chloride), poly(vinylformal), poly(vinylacetal), poly(vinylidene chloride), poly(ethylene terephthalate), polyester, polysulfone, polyolefin, copolymers thereof, and/or mixtures thereof.

Further, according to various non-limiting embodiments disclosed herein, the organic host material can form an optical element or portion thereof. Non-limiting examples of optical elements include ophthalmic elements, display elements, windows, and mirrors. As used herein the term “optical” means pertaining to or associated with light and/or vision. For example, although not limiting herein, according to various non-limiting embodiments, the optical element or device can be chosen from ophthalmic elements and devices, display elements and devices, windows, mirrors, packaging material, and active and passive liquid crystal cell elements and devices.

As used herein the term “ophthalmic” means pertaining to or associated with the eye and vision. Non-limiting examples of ophthalmic elements include corrective and non-corrective lenses, including single vision or multi-vision lenses, which may be either segmented or non-segmented multi-vision lenses (such as, but not limited to, bifocal lenses, trifocal lenses and progressive lenses), as well as other elements used to correct, protect, or enhance (cosmetically or otherwise) vision, including without limitation, contact lenses, intra-ocular lenses, magnifying lenses, and protective lenses or visors. As used herein the term “display” means the visible or machine-readable representation of information in words, numbers, symbols, designs or drawings. Non-limiting examples of display elements and devices include screens, monitors, and security elements, including without limitation, security marks and authentication marks. As used herein the term “window” means an aperture adapted to permit the transmission of radiation therethrough. Non-limiting examples of windows include automotive and aircraft transparencies, filters, shutters, and optical switches. As used herein the term “mirror” means a surface that specularly reflects a large fraction of incident light.

For example, in one non-limiting embodiment, the organic host material is an ophthalmic element, and more particularly, is an ophthalmic lens.

Further, it is contemplated that the photochromic compounds disclosed herein can be used alone or in conjunction with at least one other complementary organic photochromic compound having at least one activated absorption maxima within the range of 300 nm to 1000 nm, inclusive (or substances containing the same). For example, the photochromic compound disclosed herein can be combined with at least one other conventional organic photochromic compound such that the combination of photochromic compound, when activated, exhibits a desired hue. Non-limiting examples of suitable conventional organic photochromic compounds include those photochromic pyrans, oxazines, and fulgides, set forth above. Other complementary photochromic compounds include, for example, the pyrans, oxazines, fulgides and fulgimides described hereinafter.

Non-limiting examples of thermally reversible complementary photochromic pyrans include benzopyrans, naphthopyrans, e.g., naphtho[1,2-b]pyrans, naphtho[2,1-b]pyrans, indeno-fused naphthopyrans, such as those disclosed in U.S. Pat. No. 5,645,767, and heterocyclic-fused naphthopyrans, such as those disclosed in U.S. Pat. Nos. 5,723,072, 5,698,141, 6,153,126, and 6,022,497, which are hereby incorporated by reference; spiro-9-fluoreno[1,2-b]pyrans; phenanthropyrans; quinopyrans; fluoroanthenopyrans; spiropyrans, e.g., spiro(benzindoline)naphthopyrans, spiro(indoline)benzopyrans, spiro(indoline)naphthopyrans, spiro(indoline)quinopyrans and spiro(indoline)pyrans. More specific examples of naphthopyrans and the complementary organic photochromic substances are described in U.S. Pat. No. 5,658,501, which are hereby specifically incorporated by reference herein. Spiro(indoline)pyrans are also described in the text, Techniques in Chemistry, Volume III, “Photochromism”, Chapter 3, Glenn H. Brown, Editor, John Wiley and Sons, Inc., New York, 1971, which is hereby incorporated by reference.

Non-limiting examples of thermally reversible complementary photochromic oxazines include benzoxazines, naphthoxazines, and spiro-oxazines, e.g., spiro(indoline)naphthoxazines, spiro(indoline)pyridobenzoxazines, spiro(benzindoline)pyridobenzoxazines, spiro(benzindoline)naphthoxazines, spiro(indoline)benzoxazines, spiro(indoline)fluoranthenoxazine, and spiro(indoline)quinoxazine.

More non-limiting examples of thermally reversible complementary photochromic fulgides include: fulgimides, and the 3-furyl and 3-thienyl fulgides and fulgimides, which are disclosed in U.S. Pat. No. 4,931,220 (which are hereby specifically incorporated by reference) and mixtures of any of the aforementioned photochromic materials/compounds.

For example, it is contemplated that the photochromic compounds disclosed herein can be used alone or in conjunction with another conventional organic photochromic compound (as discussed above), in amounts or ratios such that the organic host material into which the photochromic compounds are incorporated, or onto which the organic host materials are applied, can exhibit a desired color or colors, either in an activated or a “bleached” state. Thus the amount of the photochromic compounds used is not critical provided that a sufficient amount is present to produce a desired photochromic effect. As used herein, the term “photochromic amount” refers to the amount of the photochromic compound necessary to produce the desired photochromic effect.

Another non-limiting embodiment provides a photochromic article comprising a substrate, and an at least partial coating of a coating composition having a photochromic amount of a photochromic compound of the present invention connected to at least a portion of at least one surface thereof of the substrate. Further, although not limiting herein, at least a portion of the at least partial coating can be at least partially set. As used herein the term “set” means to fix in a desired orientation.

For example, according to the above-mentioned non-limiting embodiment, the coating composition can be chosen from, without limitation, polymeric coating compositions, paints, and inks. Further, in addition to the photochromic compounds disclosed herein, the coating compositions according to various non-limiting embodiments can further comprise at least one other conventional organic photochromic compounds having at least one activated absorption maxima within the range of 300 nm to 1000 nm, inclusive.

Non-limiting examples of suitable substrates to which the coating composition comprising the photochromic amount of the photochromic compounds can be applied include glass, masonry, textiles, ceramics, metals, wood, paper and polymeric organic materials. Non-limiting examples of suitable polymeric organic materials are set forth above.

Still other non-limiting embodiments provide optical elements comprising a substrate and an at least partial coating comprising at least one photochromic compound of the present invention connected to at least a portion of the substrate. Non-limiting examples of optical elements include, ophthalmic elements, display elements, windows, and mirrors. For example, according to one non-limiting embodiment, the optical element is an ophthalmic element, and the substrate is an ophthalmic substrate chosen from corrective and non-corrective lenses, partially formed lenses, and lens blanks.

Although not limiting herein, the optical elements according to various non-limiting embodiments disclosed herein can comprise any amount of the photochromic compound necessary to achieve the desired optical properties, such as but not limited to, photochromic properties and dichroic properties.

Other non-limiting examples of substrates that are suitable for use in conjunction with the foregoing non-limiting embodiment include untinted substrates, tinted substrates, photochromic substrates, tinted-photochromic substrates, linearly polarizing substrates, circularly polarizing substrates, elliptically polarizing substrates, and reflective substrates. As used herein with reference to substrates the term “untinted” means substrates that are essentially free of coloring agent additions (such as, but not limited to, conventional dyes) and have an absorption spectrum for visible radiation that does not vary significantly in response to actinic radiation. Further, with reference to substrates the term “tinted” means substrates that have a coloring agent addition (such as, but not limited to, conventional dyes) and an absorption spectrum for visible radiation that does not vary significantly in response to actinic radiation.

As used herein the term “linearly polarizing” with reference to substrates refers to substrates that are adapted to linearly polarize radiation (i.e., confine the vibrations of the electric vector of light waves to one direction). As used herein the term “circularly polarizing” with reference to substrates refers to substrates that are adapted to circularly polarize radiation. As used herein the term “elliptically polarizing” with reference to substrates refers to substrates that are adapted to elliptically polarize radiation. As used herein with the term “photochromic” with reference to substrates refers to substrates having an absorption spectrum for visible radiation that varies in response to at least actinic radiation and is thermally reversible. Further, as used herein with reference to substrates, the term “tinted-photochromic” means substrates containing a coloring agent addition as well as a photochromic compound, and having an absorption spectrum for visible radiation that varies in response to at least actinic radiation and is thermally reversible. Thus for example, in one non-limiting embodiment, the tinted-photochromic substrate can have a first color characteristic of the coloring agent and a second color characteristic of the combination of the coloring agent and the photochromic compound when exposed to actinic radiation.

One specific non-limiting embodiment provides an optical element comprising a substrate and an at least partial coating comprising at least one photochromic compound of the present invention connected to at least a portion of the substrate. Further, according to this non-limiting embodiment, the at least one thermally reversible photochromic compound can be a photochromic-dichroic compound having an average absorption ratio greater than 2.3 in an activated state as determined according to CELL METHOD.

As discussed above, the optical elements according to various non-limiting embodiments disclosed herein can be display elements, such as, but not limited to screens, monitors, and security elements. For example, one non-limiting embodiment provides a display element comprising a first substrate having a first surface, a second substrate having a second surface, wherein the second surface of the second substrate is opposite and spaced apart from the first surface of the first substrate so as to define a gap; and a fluid material comprising at least one photochromic compound of the present invention positioned within the gap defined by the first surface of the first substrate and the second surface of the second substrate. Further, the at least one photochromic compound can be a photochromic-dichroic compound having an average absorption ratio greater than 2.3 in an activated state as determined according to CELL METHOD.

Further, according to this non-limiting embodiment, the first and second substrates can be independently chosen from untinted substrates, tinted substrates, photochromic substrates, tinted-photochromic substrates, linearly polarizing substrates, circularly polarizing substrates, elliptically polarizing substrates and reflective substrates.

Another non-limiting embodiment provides a security element comprising a substrate and at least one photochromic compound of the present invention connected to at least a portion of the substrate. Non-limiting examples of security elements include security marks and authentication marks that are connected to at least a portion of a substrate, such as and without limitation: access cards and passes, e.g., tickets, badges, identification or membership cards, debit cards etc.; negotiable instruments and non-negotiable instruments e.g., drafts, checks, bonds, notes, certificates of deposit, stock certificates, etc.; government documents, e.g., currency, licenses, identification cards, benefit cards, visas, passports, official certificates, deeds etc.; consumer goods, e.g., software, compact discs (“CDs”), digital-video discs (“DVDs”), appliances, consumer electronics, sporting goods, cars, etc.; credit cards; and merchandise tags, labels and packaging.

Although not limiting herein, according to this non-limiting embodiment, the security element can be connected to at least a portion of a substrate chosen from a transparent substrate and a reflective substrate. Alternatively, according to certain non-limiting embodiments wherein a reflective substrate is required, if the substrate is not reflective or sufficiently reflective for the intended application, a reflective material can be first applied to at least a portion of the substrate before the security mark is applied thereto. For example, a reflective aluminum coating can be applied to the at least a portion of the substrate prior to forming the security element thereon. Still further, security element can be connected to at least a portion of a substrate chosen from untinted substrates, tinted substrates, photochromic substrates, tinted-photochromic substrates, linearly polarizing, circularly polarizing substrates, and elliptically polarizing substrates.

Additionally, according to the aforementioned non-limiting embodiment the at least one photochromic compound can be a thermally reversible photochromic-dichroic compound having an average absorption ratio greater than 2.3 in the activated state as determined according to CELL METHOD.

Furthermore, security element according to the aforementioned non-limiting embodiment can further comprise one or more other coatings or sheets to form a multi-layer reflective security element with viewing angle dependent characteristics as described in U.S. Pat. No. 6,641,874, which is hereby specifically incorporated by reference herein.

The photochromic articles and optical elements described above can be formed by methods known in the art. Although not limiting herein, it is contemplated that the photochromic compounds disclosed herein can be connected to a substrate or host by incorporation into the host material or application onto the host or substrate, such as in the form of a coating.

For example, the photochromic-dichroic compound can be incorporated into an organic host material by dissolving or dispersing the photochromic compound within the host material, e.g., casting it in place by adding the photochromic compound to the monomeric host material prior to polymerization, imbibition of the photochromic compound into the host material by immersion of the host material in a hot solution of the photochromic compound or by thermal transfer. As used herein the term “imbibition” includes permeation of the photochromic compound alone into the host material, solvent assisted transfer of the photochromic compound into a porous polymer, vapor phase transfer, and other such transfer methods.

Additionally, the photochromic compound disclosed herein can be applied to the organic host material or other substrate as part of a coating composition (as discussed above) or a sheet comprising the photochromic compound. As used herein the term “coating” means a supported film derived from a flowable composition, which may or may not have a uniform thickness. As used herein the term “sheet” means a pre-formed film having a generally uniform thickness and capable of self-support.

Non-limiting methods of applying coating compositions comprising the photochromic compounds disclosed herein include those methods known in the art for applying coatings, such as, spin coating, spray coating, spray and spin coating, curtain coating, flow coating, dip coating, injection molding, casting, roll coating, wire coating, and overmolding. According to one non-limiting embodiment, a coating comprising the photochromic compound is applied to a mold and the substrate is formed on top of the coating (i.e., overmolding). Additionally or alternatively, a coating composition without the photochromic compound can be first applied to the substrate or organic host material using any of the aforementioned techniques and thereafter imbibed with the photochromic compound as described above.

Non-limiting methods of applying sheets comprising the photochromic compound disclosed herein to a substrate include, for example, at least one of: laminating, fusing, in-mold casting, and adhesively bonding the polymeric sheet to the at least a portion of the substrate. As used herein, the in-mold casting includes a variety of casting techniques, such as but not limited to: overmolding, wherein the sheet is placed in a mold and the substrate is formed (for example by casting) over at least a portion of the substrate; and injection molding, wherein the substrate is formed around the sheet. Further, it is contemplated that the photochromic compound can be applied to the sheet as a coating, incorporated into the sheet by imbibition or by other suitable methods, either prior to applying the sheet to the substrate or thereafter.

Moreover, as discussed above, the photochromic compounds disclosed herein can be incorporated or applied alone, or in combination with at least one other conventional organic photochromic compound, which can also be applied or incorporated into the host materials and substrates as described above. Additional coatings may be applied to the photochromic article including other photochromic coatings, anti-reflective coatings, linearly polarizing coatings, transitional coatings, alignment layers, primer coatings, adhesive coatings, mirrored coatings and protective coatings including antifogging coatings, oxygen barrier coatings and qtrgynIpt liaht absorbing coatings.

Various embodiments disclosed herein will now be illustrated in the following non-limiting examples.

EXAMPLES Part I: Preparation Example 1

Step 1

-   -   2,3-Dimethoxy-7,7-dimethyl-7H-benzo[c]fluoren-5-ol (100.17 grams         (g), 0.31 mole (mol)), 2,6-dimethylpiperidine (38.93 g, 0.344         mole), tetrahydrofuran (THF) (400 milliliters (mL)) and toluene         (400 mL) were added to a reaction flask equipped with an         addition funnel and a condenser. The resulting mixture was         stirred. Ethyl magnesium bromide (240 mL of a 3 Molar solution         in hexanes) was added slowly with the condenser open to the         atmosphere. After the addition, about 300 mL of solvent was         removed by distillation and nitrogen was applied through the         condenser. The remaining mixture was refluxed for about 16         hours. The mixture was then poured into a beaker containing 3 L         of water. The pH was adjusted to about 3 using 12 N hydrochloric         acid (HCl). The water was decanted and the resulting oily         mixture was dissolved in ethyl acetate, dried over magnesium         sulfate and concentrated. Methylene chloride was added to the         mixture to crystallize the product. The product was collected by         vacuum filtration and dried in a vacuum desiccator yielding 57         grams of off-white crystals. A Nuclear Magnetic Resonance (NMR)         spectrum showed that the recovered product had a structure         consistent with         7,7-dimethyl-3-methoxy-7H-benzo[c]fluorene-2,5-diol.

Step 2

-   -   4-Fluorobenzophenone (44.6 g) and anhydrous dimethyl sulfoxide         (DMSO) (200 mL) were added to a reaction flask under nitrogen.         1-(4-methoxyphenyl)-piperazine (94 g) was added, and the         suspension was heated to 160° C. After 2 hours, heat was         removed, and the mixture was poured into 4 liters of water. The         precipitate was collected by vacuum filtration, washed with         acetone and dried in vacuum. NMR data showed that the resulting         product (81.5 g), recovered as a white solid, had a structure         consistent with 4-(4-(4-methoxyphenyl)piperazin-1-yl)         benzophenone.

Step 3

-   -   The product of Step 2,         4-(4-(4-methoxyphenyl)piperazin-1-yl)benzophenone (80.6 g) and         dimethylformamide (DMF) (750 mL, saturated with acetylene) were         added to a reaction flask. A sodium acetylide suspension (121 g         of a 18 weight percent slurry in toluene, obtained from Aldrich)         was added to the mixture with stirring. After 30 minutes, the         reaction was poured into a stirred mixture of deionized water         (2 L) and hexanes (500 mL). The solid formed was collected by         vacuum filtration and dried in vacuum. An NMR spectrum showed         that the final product (85 g), an off-white powder, had a         structure consistent with         1-phenyl-1-(4-(4-methoxyphenylpiperazin-1-yl)         phenyl)-prop-2-yn-1-ol.

Step 4

-   -   The product of Step 1,         7,7-dimethyl-3-methoxy-7H-benzo[c]fluorene-2,5-diol (1.93 g, 6.3         millimole (mmole)), and the product of Step 3,         1-phenyl-1-(4-(4-methoxyphenylpiperazin-1-yl)phenyl)-prop-2-yn-1-ol         (2.76 g, 6.9 mmole), trimethyl orthoformate (1.47 g, 13.9         mmole), pyridinium p-toluenesulfonate (0.08 g, 0.3 mmole) and         chloroform (40 mL) was added to a reaction flask, stirred and         refluxed for 6 hours. The resulting product was kept stirring at         room temperature (approximately 23° C.) for 12 hours. The         solution was then concentrated to a smaller volume until the         product started to foam. Methanol, 250 mL was added to         precipitate the product. A black solid (4.1 g) was obtained         after vacuum filtration. The recovered product was identified by         NMR as having a structure consistent with         3-phenyl-3-(4-(4-methoxyphenylpiperazin-1-yl)phenyl)-13,13-dimethyl-6-methoxy-7-hydroxyl-3H,         13H-indeno[2′,3′:3,4]naphtho[1,2-b]pyran.

Step 5

-   -   The product of Step 4,         3-phenyl-3-(4-(4-methoxyphenylpiperazin-1-yl)phenyl)-13,13-dimethyl-6-methoxy-7-hydroxyl-indeno[2′,3′:3,4]naphtho[1,2-b]pyran         (3.1 g, 4.5 mmole), and pyridine (30 mL) at 0° C. were added to         a reaction flask and stirred, trifluoromethanesulfonic acid         anhydride (1.53 g, 5.4 mmole) was added in one portion. The         resulting reaction was stirred for 4 hours at room temperature         and then poured into a beaker containing water (500 mL). The         precipitated product was collected by vacuum filtration. It was         dissolved in chloroform followed by precipitation from methanol.         An NMR spectrum showed that the recovered product (3.3 g), a         green solid, had a structure consistent with         3-phenyl-3-(4-(4-methoxyphenylpiperazin-1-yl)         phenyl)-13,13-dimethyl-6-methoxy-7-trifluoromethanesulfonyloxy-3H         ,13H-indeno [2′,3′:3,4]naphtho[1,2-b]pyran.

Example 2

-   -   The product of Example 1,         3-phenyl-3-(4-(4-methoxyphenylpiperazin-1-yl)phenyl)-13,13-dimethyl-6-methoxy-7-         trifluoromethanesulfonyloxy-3H,13H-indeno[2′,3′:3,4]naphtho[1,2-b]pyran         (11.37 g, 13.9 mmole), zinc cyanide (1.71 g, 14.6 mmole), zinc         acetate (0.1 g, 0.56 mmole), zinc (0.036 g, 0.56 mmole),         dimethylformamide (DMF) (40 mL), deionized water (0.4 mL),         1,1′-bis(diphenylphosphino)ferrocene (0.02 g, 0.035 mmole) and         tris(dibenzylideneacetone)dipalladium (0.013 g, 0.014 mmole) was         added to a reaction flask degassed and stirred under the         protection of nitrogen. The reaction flask was kept in an oil         bath maintained at a temperature of 90-100° C. After 12 hours         1,1′-bis(diphenylphosphino)ferrocene (0.05 g) and         tris(dibenzylideneacetone)dipalladium (0.032 g) was added. After         24 more hours, the reaction mixture was diluted with ethyl         acetate (300 mL), filtered through Grade 60, 230-400 mesh silica         gel available from Fisher Scientific, and concentrated. The         resulting product was purified by flash chromatography using         ethyl acetate/hexanes with a volume ratio of 1/4. A green solid         (5.6 g) was recovered as the product. An NMR spectrum showed         that the product had a structure consistent with         3-phenyl-3-(4-(4-methoxyphenylpiperazin-1-yl)phenyl)-13,13-dimethyl-6-methoxy-7-cyano-3H,         13H-indeno[2′,3′:3,4]naphtho[1,2-b]pyran.

Example 3

-   -   The product of Example 1,         3-phenyl-3-(4-(4-methoxyphenylpiperazin-1-yl)phenyl)-13,13-dimethyl-6-methoxy-7-trifluoromethanesulfonyloxy-3H,         13H-indeno[2′,3′:3,4]naphtho[1,2-b]pyran (1.71 g, 2.1 mmole),         2-methyl-3-butyn-2-ol (0.26 g, 3.1 mmole),         bis(triphenylphosphine)palladium(II) chloride 0.015 g, 0.02         mmole), copper (I) iodide (8 mg, 0.04 mmole), triphenyl         phosphine (22 mg, 0.08 mmole) and diisopropyl amine (10 ml) was         added to a reaction flask, degassed, protected by dry nitrogen         and stirred at 70-80° C. for about 12 hours. The reaction         mixture was poured into cold water (100 mL) and the resulting         precipitate was collected. The resulting product was then         purified by flash chromatography using ethyl acetate/hexanes         with a volume ratio of 3/7. A green solid (1.18 g) was recovered         as the product. An NMR spectrum showed that the product had a         structure consistent with         3-phenyl-3-(4-(4-methoxyphenylpiperazin-1-yl)phenyl)-13,13-dimethyl-6-methoxy-7-(2-hydroxy-2-methyl-3-butyn-4-yl)-indeno         [2′,3′:3,4]naphtho[1,2-b]pyran.

Example 4

Step 1

-   -   3′-Bromoacetophenone (200.0 g, 1 mol), dimethyl succinate (190         g, 1.3 mmole) and toluene (800 mL) were added to a 3 L flask and         placed on magnetic stir under nitrogen. Potassium t-butoxide         (123 g, 1.1 mole) was added over a one hour period. The         temperature was controlled to less than 40° C. After one hour,         the resulting reaction mixture was poured into 1 L of water and         stirred for 15 minutes. The layers were separated, and the         aqueous layer was acidified to pH 4 while stirring. Ethyl         acetate (500 mL) was added to the stirring mixture, and the         layers were separated after 15 minutes. The solvent was removed         by rotary evaporator, and the resulting product was isolated as         translucent brown oil. The oil was not purified but used         directly in the next step.

Step 2

-   -   Acetic anhydride (300 ml) was added to a 2 L flask containing         the product from Step 1 (220 g, 0.7 mole). The solution was         heated to 100° C. under nitrogen. After 4 hours, the resulting         reaction was concentrated to brown oil. The oil was dissolved in         methylene chloride, washed twice with sodium bicarbonate         saturated water, dried over magnesium sulfate and concentrated.         The resulting oil was crystallized from ether (34 g crystals         were obtained). The remaining crude oil (102 g) was used in next         step.

Step 3

-   -   Methanol (300 mL) was added to a 1 L flask containing the crude         oil from Step 2 (102 g). Concentrated HCl (1 mL) was added and         the solution was heated to reflux temperature and maintained         there for 4 hours. More of the concentrated HCL (1 mL) was added         and the reaction mixture was refluxed another 4 hours.         Afterwards, the reaction mixture was concentrated into oil. The         crude product was purified by crystallization from acetonitrile         and t-butyl methyl ether. A white solid was obtained as the         product (40 g), which was identified by NMR as having a         structure consistent with 6-bromo-1-hydroxy-4-methyl-3-naphthoic         acid methyl ester.

Step 4

-   -   A mixture of 6-bromo-1-hydroxy-4-methyl-3-naphthoic acid methyl         ester (5 g, 17 mmole), zinc cyanide (2.2 g, 19 mmole), zinc         acetate (0.13 g, 0.7 mmole), zinc (0.046 g, 0.7 mmole), DMF (100         mL), water (1 mL), 1,1′-bis(diphenylphosphino)ferrocene (0.047         g, 0.085 mmole) and tris(dibenzylideneacetone)dipalladium (0.031         g, 0.034 mmole) was added to a reaction flask, degassed and         stirred under the protection of nitrogen. The reaction mixture         was heated to 70° C. After 24 hours,         1,1′-bis(diphenylphosphino)ferrocene (0.5 g) and         tris(dibenzylideneacetone)-dipalladium (0.03 g) were added and         the reaction was maintained under the same conditions for 15         hours. The resulting suspension was vacuum filtered to remove         zinc. The solution was poured into 200 mL water and stirred for         15 minutes. The solid product was collected by vacuum filtration         and recrystallized from ethyl acetate The recovered product, 1.1         g of yellow-white crystals, was identified by NMR as having a         structure consistent with 6-cyano-1-hydroxy-4-methyl-3-naphthoic         acid methyl ester.

Step 5

-   -   The product of Step 4, 6-cyano-1-hydroxy-4-methyl-3-naphthoic         acid methyl ester (1 g, 4 mmole), the product of Step 3 of         Example 1,         1-phenyl-1-(4-(4-methoxyphenylpiperazin-1-yl)phenyl)-prop-2-yn-1-ol         (1.9 g, 4.8 mmole), pyridinium p-toluenesulfonate (0.2 g, 0.8         mmole) and chloroform (100 mL) was heated to reflux. After 4         hours, the incomplete reaction mixture was concentrated to an         oil and purified by column separation using hexanes:ethyl         acetate with a volume ratio of 4:1. The product was further         purified by recrystallization from ethyl acetate. A pink-white         solid (0.3 g) was obtained as the desired product. The product         was confirmed by NMR as having a structure consistent with         2-phenyl-2-[4-(4-Methoxy-phenyl)-piperazin-1-yl]-phenyl-5-methoxycarbonyl-6-methyl-8-cyano-2H-naphtho[1,2-b]pyran.

Example 5

Step 1

-   -   Toluene (3.0L) was added under nitrogen to a suitable 16 liter         reactor. 3-Bromoacetophenone (600 grams) and dimethyl succinate         (512 mL) were added to the reactor. Potassium tert-pentoxide in         an approximately 25 weight percent solution in toluene (2,640         mL) was added to the reactor at a rate of approximately 50 mL         per minute while keeping the temperature below 35° C. After         completion of the addition, the resulting reaction mixture was         stirred for 1 to 3 hours until the amount of 3-bromoacetophenone         was less than 1 weight percent as determined by High Performance         Liquid Chromatography (HPLC). The reaction mixture was cooled to         15° C. and water (4 L) was added. The resulting mixture was         warmed to 20-25° C. and stirred for 30 minutes. After phase         separation, the bottom aqueous phase was collected. Toluene         (1.5 L) was added and stirring continued for 15 minutes. After         phase separation, the bottom aqueous phase was collected and         methylene chloride (4 L) was added to it. The resulting mixture         was maintained at a temperature of 20-25° C. and 6N HCl (850-900         mL) was added while stirring to reduce the pH to approximately         2.0. The resulting mixture was stirred for 20 minutes. After         phase separation, the bottom organic phase was collected, washed         with water (2 L) and filtered through a plug of 200 grams of         silica with a half inch (1.27 cm) thick layer of magnesium         sulfate on the top. The plug was rinsed with 1.5 L methylene         chloride and then with a 30 weight percent ethyl acetate in         methylene chloride mixture until all the product as determined         by Thin Layer Chromatography (TLC). The resulting solution was         distilled to a volume of 4L and transferred to a 6 L reactor as         a crude solution without the isolation of pure product.

Step 2

-   -   Xylene (1.8L) was added to the crude solution from Step 1 and         the resulting mixture was distilled at 100° C. to remove the         methylene chloride. Afterwards, the temperature of the reactor         contents was reduced to 60° C. and 4-dimethylamino pyridine (3.6         grams) and acetic anhydride (615 grams) were added to the         reactor. The resulting mixture was heated to 120° C. and         maintained at that temperature for 24 to 30 hours. After the         reaction was completed, the reaction mixture was cooled to         70° C. HCl, 10 weight percent, (150 mL) was added through a         dropping funnel while maintaining the reaction mixture         temperature below 80° C. The resulting reaction was maintained         at 77° C. for 24 to 30 hours. After the reaction was completed,         xylene (500 mL) and heptanes (1.2 L) were slowly added to the         reaction mixture while it was maintained above 65° C. After the         addition, the resulting reaction mixture was cooled to about         20° C. over a period of 3-4 hours. After cooling to 20° C., the         reaction mixture was stirred for 6-12 hours for crystallization.         The reaction mixture was cooled to 10° C. and the product         (crystals) was filtered, washed with 1:1 volume ratio of         xylene:heptanes (1-2 L) followed by a wash with heptanes (2-3 L)         and dried at 80° C. The resulting product was confirmed by NMR         to have a structure consistent with         2-methoxycarbonyl-7-bromo-1-methyl-2-naphth-4-ol.

Step 3

-   -   To a suitable reactor was added methanol (2.5 L),         2-methoxycarbonyl-7-bromo-1-methyl-2-naphth-4-ol, the product of         Step 2 (250 grams), and water (200 mL). The resulting reaction         mixture was stirred while sodium hydroxide, 50 weight percent,         150 mL was added slowly through a dropping funnel and the funnel         was washed with water (50 mL). The resulting mixture was         maintained at 65° C. with stirring for about 3 hours. After         about 3 hours, the temperature of the reaction mixture was         increased to 75° C. and methanol (2 L) was distilled off. Water         (250 mL) was added to the reaction mixture and the temperature         was increased to 80° C. while the distillation was continued.         Then the reaction mixture was cooled to 15° C. HCl, 10 weight         percent, (1.5 L) was added to the reaction mixture while         maintaining the temperature below 25° C. Ethyl acetate (2.5 L)         was added followed by HCl, 10 weight percent, (300-400 mL) until         a pH of 2.0 was obtained. The lower aqueous layer was separated         and discarded. The organic phase was washed with sodium         chloride, 10 weight percent, (1 L) and filtered through a small         plug of Celite and magnesium sulfate. The filtered organic phase         was transferred to a reactor and distilled to a minimum volume.         Toluene (1 L) was added and the distillation was continued until         the mixture reached 100° C. The resulting mixture was cooled to         15° C., stirred for 2-3 hours and the crystallized product was         filtered. The resulting product was washed with 1:1 volume ratio         of toluene:heptanes (1 L), followed by a washing with heptanes         (1-1.5 L) and dried at 80° C. The resulting product was         confirmed by NMR as having a structure consistent with         7-bromo-4-hydroxy-1-methyl-2-naphthoic acid.

Step 4

-   -   7-Bromo-4-hydroxy-1-methyl-2-naphthoic acid from Step 3 (20.15         g, 74.35 mmole), 2-methoxy ethanol (200 mL) and         p-toluenesulfonic acid (8.00 g, 37.17 mol) were added to a round         bottom flask (500 mL) equipped with a Dean-Stark apparatus and         stirring bar. The mixture was heated to reflux for 24 h and then         cooled to room temperature. The solvent was removed under vacuum         to produce an oily residue. The residue was dissolved in ethyl         acetate (300 mL) and washed with saturated aqueous sodium         bicarbonate three times, each time with 100 mL. The resulting         ethyl acetate solution was dried with anhydrous sodium sulfate         and concentrated under vacuum to produce a brown solid (17.4 g).         NMR analysis of the brown solid indicated that the solid has a         structure consistent with         2-methoxyethyl-7-bromo-4-hydroxy-1-methyl-2-naphthoate.

Step 5

-   -   1,1-Bis(4-methoxyphenyl)prop-2-yn-1-ol (2.99 g, 11.18 mmole) and         p-toulenesulfonic acid (141 mg, 0.74 mmole) were added to a         reaction flask containing a chloroform solution of the product         from Step 4,         2-methoxyethyl-7-bromo-4-hydroxy-1-methyl-2-naphthoate (2.52 g,         7.46 mmole). The solution was heated to reflux for 4 hours and         then the reaction mixture was cooled and the solvent removed         under vacuum to produce an oily residue. The residue was         purified by column chromatography, using 9:1, based on volume,         of a hexane and ethyl acetate mixture as the eluant. Fractions         containing the desired product were grouped and concentrated         under vacuum to produce an oily residue (3.06 g). NMR analysis         of the residue indicated a structure that was consistent with         2,2-bis(4-methoxyphenyl)-5-methoxyethylcarbonyl-6-methyl-8-bromo-2H-naphtho[1,2-b         ]pyran.

Step 6

-   -   To a reaction flask containing 2,2-bis(4-methoxyphenyl)-5-         methoxyethylcarbonyl-6-methyl-8-bromo-2H-naphtho[1,2-b]pyran         from Step 5 (2.89 g, 4.91 mmole) and vinylboronic acid pinacol         ester (1 mL, 5.89 mmole) in a 1:1 mixture of THF (25 mL) and         water (25 mL) was added potassium fluoride (4.56 g, 78.62         mmole). The solution was degassed by bubbling nitrogen for 10         min. To the degassed solution         bis(triphenylphosphine)palladium(11) chloride (0.34 g, 0.49         mmole) was added. The solution was heated to reflux for 18 h,         cooled to room temperature and diluted with ethyl acetate. The         mixture was then filtered through a bed of Celite and the         filtrate was partitioned with ethyl acetate and water. The ethyl         acetate extract was collected, dried with anhydrous sodium         sulfate and concentrated under vacuum to produce an oily         residue. The residue was purified by column chromatography using         4:1, based on volume, of a hexane and ethyl acetate mixture as         the eluant. Fractions that contained the desired product were         grouped and concentrated under vacuum to produce a glassy         residue (1.98 g). NMR analysis of the residue indicated a         structure that was consistent with         2,2-bis(4-methoxyphenyl)-5-methoxyethylcarbonyl-6-methyl-8-vinyl-2H-         naphtho[1,2-b]pyran.

Example 6

Step 1

-   -   A mixture of the product of Step 1 of Example 5, (17.4 g, 51.5         mmole) and vinylboronic acid pinacol ester (11.0 mL, 61.8 mmole)         in 1:1 mixture of THF (250 mL) and water (250 mL) was added         potassium fluoride (48.0 g, 824 mmole). The solution was         degassed by bubbling nitrogen for 20 min. To the degassed         solution bis(triphenylphosphine)palladium(II) chloride (1.81 g,         2.58 mmole) was added. The solution was heated to reflux for 20         h, the reaction mixture was cooled to room temperature and         diluted with ethyl acetate. The mixture was then filtered         through a bed of Celite and the filtrate was partitioned with         ethyl acetate and water. The ethyl acetate extract was         collected, dried with anhydrous sodium sulfate and concentrated         in vacuo to afford an oily residue. The residue was purified by         column chromatography using 4:1 hexane and ethyl acetate mixture         as the eluant. Fractions that contained the desired product were         grouped and concentrated under vacuum to produce a brown solid         (11.5 g). NMR analysis of the brown solid indicated a structure         that was consistent with 2-methoxyethyl         7-vinyl-4-hydroxy-1-methyl-2-naphthoate.

Step 2

-   -   The product from Step 1,         2-methoxyethyl-7-vinyl-4-hydroxy-1-methyl-2-naphthoate (11.55 g,         40.38 mmole) was added to a reaction flask containing methylene         chloride (200 mL) and pyridine (7.00 mL, 80.76 mmole) was added.         The mixture was stirred for 5 min. and triisopropylsilyl         trifluoromethane sulfonate (16.30 mL, 60.57 mmole) was slowly         added. The mixture was stirred for 30 min at room temperature,         poured into ice cold water (500 mL) and stirred for 10 min. The         mixture was partitioned and the methylene chloride solution was         collected, dried with anhydrous sodium sulfate and concentrated         under vacuum to produce an oily residue. The residue was         purified using a silica plug with a 19:1, volume basis, of a         hexane and ethyl acetate mixture. Fractions containing the         desired material were grouped and concentrated under vacuum to         produce a colorless oil (17.85 g). NMR analysis indicated a         structure that was consistent with         2-methoxyethyl-7-vinyl-4-(triisopropylsilyloxy)-1-methyl-2-naphthoate.

Step 3

-   -   The product of Step 2,         2-methoxyethyl-7-vinyl-4-(triisopropylsilyloxy)-1-methyl-2-naphthoate         (17.85 g, 40.38 mmole) was added to a reaction flask containing         t-butanol (121 mL) and water (283 mL) and cooled to 0° C. A         solution of potassium permanganate (19.35 g, 122.49 mmole) in         water (180 mL) was added slowly to the reaction flask. The pH of         the solution was adjusted to 8-10 by the addition of aqueous         sodium carbonate. The ice bath was removed and the reaction         mixture was warmed to room temperature and stirred for 4 hours.         The resulting mixture was filtered through a bed of Celite and         the filtrate was carefully acidified to pH 4 by the addition of         10 weight percent aqueous hydrochloric acid. The resulting         aqueous solution was extracted with ethyl acetate three times,         each time with 300 mL, and the organic layer was collected,         dried with anhydrous sodium sulfate, and concentrated under         vacuum to produce an oily residue. The oily residue was purified         through a silica plug using a 4:1, volume basis, of an ethyl         acetate and hexane mixture. Fractions containing the desired         material were grouped and concentrated under vacuum to produce a         yellow solid (9.14 g). NMR analysis indicated a structure that         was consistent with         7-((2-methoxyethoxy)carbonyl)-8-methyl-5-(triisopropylsilyloxy)-2-naphthoic         acid.

Step 4

-   -   The product of Step 3,         7-((2-methoxyethoxy)carbonyl)-8-methyl-5-(triisopropylsilyloxy)-2-naphthoic         acid (1.17 g, 2.54 mmole) was added to a reaction flask         containing methylene chloride (10 mL). Methanol (0.09 mL, 2.12         mmole) was added followed by dimethylamino pyridine (0.04 g,         0.33 mmole) and N, N′-dicyclohexylcabodiimide (0.53 g, 2.57         mmole). The mixture was stirred for 1 h at room temperature. The         resulting mixture was diluted with methylene chloride and         filtered. The filtrate was collected and concentrated under         vacuum to produce a yellow solid that was not further purified.         The yellow solid was added to a reaction flask containing         tetrahydrofuran (10 mL) and water (10 mL). Potassium fluoride         (0.35g, 6.03 mmole) was added and the mixture stirred at room         temperature for 20 h. The resulting mixture was extracted with         ethyl acetate (100 mL) and partitioned with water. The ethyl         acetate extract was collected, dried with anhydrous sodium         sulfate, and concentrated under vacuum to produce an oily         residue. The residue was dissolved in a minimum amount of         methylene chloride and hexanes were added until a precipitate         formed. The precipitate (0.61 g) was collected by vacuum         filtration and washed with cold hexane. NMR analysis of the         precipitate indicated a structure that was consistent with         2-(2-methoxyethyl)-7-methyl-4-hydroxy-1-methylnaphthalene-2,7-dicarboxylate.

Step 5

-   -   The product from Step 4,         2-(2-methoxyethyl)-7-methyl-4-hydroxy-1-methylnaphthalene-2,7-dicarboxylate         (0.61 g, 1.92 mmole), was added to a reaction flask containing         chloroform (20mL). 1,1-Bis(4-methoxyphenyl)prop-2-yn-1-ol (0.77         g, 2.87 mmole) and p-toluenesulfonic acid (0.04 g, 0.0.21 mmole)         were added. The resulting solution was heated to reflux and         maintained at reflux temperature for 4 hours. Afterwards, the         reaction mixture was cooled and the solvent removed under vacuum         to produce an oily residue. The residue was purified by column         chromatography and eluted with a 4:1, volume basis, of a hexane         and ethyl acetate mixture. Fractions containing the desired         product were grouped and concentrated under vacuum to produce an         oily residue (0.76 g). NMR analysis of the residue indicated a         structure that was consistent with         2,2-bis(4-methoxyphenyl)-5-methoxyethylcarbonyl-6-methyl-8-methoxycarbonyl-2H-naphtho-[1.2-b]pyran.

Example 7

Step 1

-   -   To a reaction flask containing the product of Step 5 of Example         6, 5-(2-methoxyethyl)-8-methyl         2,2-bis(4-methoxyphenyl)-6-methyl-2H-naphtho-[1.2-b]pyran-5,8-dicarboxylate         (0.56 g, 0.98 mmole) was added tetrahydrofuran (10 mL), methanol         (5 mL) and 50 weight percent aqueous sodium hydroxide (3 mL).         The mixture was stirred for 30 min. and then poured into a         beaker containing 10 weight percent aqueous hydrochloric acid         (100 mL) solution. The resulting mixture was extracted with         ethyl acetate, three times each time with 100 mL. The ethyl         acetate extracts were collected, dried with anhydrous sodium         sulfate and concentrated under vacuum to produce an oily         residue. The residue was purified using a silica plug eluted         with a 19:1, volume basis, ethyl acetate and methanol mixture.         The fractions containing the desired product were grouped and         concentrated under vacuum to produce foam (0.45 g). NMR analysis         of the foam indicated a structure that was consistent with         2,2-bis(4-methoxyphenyl)-5-methoxyethoxycarbonyl-6-methyl-8-hydroxycarbonyl-2H-naphtho[1,2-b]pyran.

Comparative Example 1

-   -   A mixture of the product of Example 1,         3-phenyl-3-(4-(4-methoxyphenylpiperazin-1-yl)         phenyl)-13,13-dimethyl-6-methoxy-7-trifluoromethanesulfonyloxy-3H         ,13H-indeno [2′,3′:3,4]naphtho[1,2-b]pyran (0.13 g, 0.16 mmol),         potassium carbonate (0.054 g, 0.4 mmole),         Tetrakistriphenylphosphine palladium (0) (0.018 g, 0.016 mmole),         2-butanol (3 mL) and THF (1 mL) was added to a reaction flask,         degassed and stirred under the protection of nitrogen. The         reaction mixture was heated to reflux. After 3 hours, reaction         mixture was diluted with 100 mL ethyl acetate, washed with         water, dried over magnesium sulfate and concentrated. The crude         product was purified by flash chromatography (3/7 ethyl         acetate/hexanes). The product was further purified by         dissolution into methylene chloride followed by precipitation         from methanol. A grey solid (0.08 g) was obtained. It was         identified by NMR as having a structure consistent with         3-phenyl-3-(4-(4-methoxyphenylpiperazin-1-yl)phenyl)-13,13-dimethyl-6-3H,13H-methoxy-indeno[2′,3′:3,4]naphtho[1,2-b]pyran.

Comparative Example 2

Step 1

-   -   A mixture of the product of Step 3 of Example 6,         7-((2-methoxyethoxy)-carbonyl)-8-methyl-5-(triisopropylsilyloxy)-2-naphthoic         acid (2.3 g, 7.8 mmole), potassium carbonate (4.4 g, 32 mmole),         tetrakistriphenylphosphine palladium (0) (0.52 g, 0.44 mmole),         2-butanol (20 ml) and methanol (10 ml) was added to a reaction         flask, degassed and stirred under the protection of nitrogen.         The reaction mixture was heated to reflux. After 6 hours,         reaction mixture was diluted with 100 ml ethyl acetate, washed         with water, dried over magnesium sulfate, filtered through a         thin layer of silica gel and concentrated. A brownish glassy         solid (1.7 g) was obtained and used directly in the next step.         It was identified by NMR as having a structure consistent with         1-hydroxy-4-methyl-3-naphthoic acid methyl ester.

Step 2

-   -   A mixture of the product of Step 1,         1-hydroxy-4-methyl-3-naphthoic acid methyl ester (1.6 g, 7.4         mmole),         1-phenyl-1-(4-(4-methoxyphenylpiperazin-1-yl)phenyl)-prop-2-yn-1-ol         (2.9 g, 7.4 mmole), p-tolunesulfonic acid (0.14 g, 0.74 mmol)         and methylene chloride (30 mL) was stirred and refluxed for 17         hours. Product in the reaction mixture was then separated by         flash chromatography (3/7 ethyl acetate/hexanes). The recovered         dark red solid was stirred in methanol for 20 hours. A light         yellow solid (1.3 g) was obtained as the desired product. The         product was confirmed by NMR as having a structure consistent         with         2-phenyl-2-[4-(4-Methoxy-phenyl)-piperazin-1-yl]-phenyl-5-methoxycarbonyl-6-methyl-2H-naphtho[1,2-b]pyran.

Comparative Example 3

Step 1

-   -   A mixture of the product of Step 5 of Example 5,         2,2-bis(4-methoxyphenyl)-5-methoxyethylcarbonyl-6-methyl-8-methoxycarbonyl-2H-naphtho-[1.2-b]pyran         (1.37 g, 2.33 mmole), potassium carbonate (1.29 g, 9.32 mmole),         2-butanol (10 mL) and methanol (10 mL) were added to a round         bottom flask (100 mL) and degassed for 10 min.         Tetrakistriphenylphosphine palladium (0) (0.13 g, 0.12 mmol) was         added and the mixture was heated to reflux under nitrogen. The         mixture was maintained at reflux temperature for 4 hours. The         resulting mixture was diluted with ethyl acetate, washed with         water, dried with anhydrous sodium sulfate and concentrated         under vacuum to produce an oily residue. The residue was         purified by flash column chromatography using 9:1, volume basis,         of a hexane and ethyl acetate mixture as the eluant. Fractions         that contained the desired product were grouped and concentrated         under vacuum to produce a red oily residue (0.95 g). The product         was confirmed by NMR as having a structure consistent with         2,2-bis(4-methoxyphenyl)-5-((2-methoxyethoxy)         carbonyl-6-methyl-2H-naphtho[1,2-b]pyran.

Part II: Testing

-   -   The photochromic performance of the photochromic materials of         Examples 1-7, and Comparative Examples (CE) 1, 2 and 3 were         tested using the optical bench set-up described below. Each of         the photochromic materials were incorporated into methacrylate         test squares as described hereinafter. CE 1 was included for         comparison to Examples 1-3 and CE 2 was included for comparison         to Example 4 and CE 3 was included for comparison to Examples         5-7.     -   It will be appreciated by those skilled in the art that the         photochromic materials of Examples 1-7 and CE1-3 may be made in         accordance with the teachings and examples disclosed herein with         appropriate modifications, which will be readily apparent to         those skilled in the art upon reading the present disclosure.         Further, those skilled in the art will recognize that various         modifications to the disclosed methods, as well as other         methods, may be used in making the photochromic materials of         Examples 1-7 without deviating from the scope of the present         disclosure as set forth in the specification and claims herein.     -   A quantity of the photochromic material to be tested, calculated         to yield a 1.5×10⁻³ M solution was added to a flask containing         50 grams of a monomer blend of 4 parts ethoxylated bisphenol A         dimethacrylate (BPA 2E0 DMA), 1 part poly(ethylene glycol) 600         dimethacrylate, and 0.033 weight percent 2,2′-azobis(2-methyl         propionitrile) (“AIBN”). The photochromic material was dissolved         into the monomer blend by stirring and gentle heating. After a         clear solution was obtained, it was vacuum degassed before being         poured into a flat sheet mold having the interior dimensions of         2.2 mm×6 inches (15.24 cm)×6 inches (15.24 cm). The mold was         sealed and placed in a horizontal air flow, programmable oven         programmed to increase the temperature from 40° C. to 95° C.         over a 5 hour interval, hold the temperature at 95° C. for 3         hours, and then lower the temperature to 60° C. for at least 2         hours. After the mold was opened, the polymer sheet was cut         using a diamond blade saw into 2 inch (5.1 cm) test squares.     -   The test squares incorporating the photochromic         materials,prepared as described above were tested for         photochromic response on an optical bench. Prior to testing on         the optical bench, the photochromic test squares were exposed to         365 nm ultraviolet light for about 30 minutes to cause the         photochromic materials therein to transform from the unactivated         ground (or bleached) state to an activated (or colored) state,         and then placed in a 75° C. oven for about 15 minutes to allow         the photochromic material to revert back to the unactivated         state. The test squares were then cooled to room temperature,         exposed to fluorescent room lighting for at least 2 hours, and         then kept covered (that is, in a dark environment) for at least         2 hours prior to testing on an optical bench maintained at         23° C. The bench was fitted with a 300-watt xenon arc lamp, a         remote controlled shutter, a Melles Griot KG2 3 mm filter that         modifies the UV and IR wavelengths and acts as a heat-sink,         neutral density filter(s), and a sample holder, situated within         a 23° C. water bath, in which the square to be tested was         inserted. The sample holder and sample were positioned at a         small angle (approximately 31°) to the activation beam produced         by the 300 Watt xenon arc lamp. A collimated beam of light from         a tungsten lamp was passed through the sample square normal to         the square and 31° to that activation beam. After passing         through the square, the light from the tungsten lamp was         directed to a collection (integration) sphere, where the light         was blended, and on to an Ocean Optics S₂₀₀₀ spectrometer where         the spectrum of the measuring beam was collected and analyzed.         The λ_(max-vis) is the wavelength in the visible spectrum at         which the maximum absorption of the activated (colored) form of         the photochromic material in the test square occurs. The         λ_(max-vis) wavelength was determined by testing the         photochromic test squares in a Varian Cary 4000 UV-Visible         spectrophotometer.     -   The saturated optical density (“Sat'd OD”) for each test square         was determined by opening the shutter from the xenon lamp and         measuring the transmittance at λ_(max-vis) before and after         exposing the test chip to UV radiation for 30 minutes. This         Sat'd OD at λ_(max-vis) was calculated from the initial and         activated spectra measured by the S₂₀₀₀ spectrometer on the         optical bench. The Sensitivity is a measure of how quickly the         photochromic initially begins to activate and is calculated as         12 times the optical density achieved at 5 seconds of         activation. The Fade Rate, as measured by the fade half life         (i.e., T¹/₂), is the time interval in seconds for the absorbance         of the activated form of the photochromic material in the test         squares to reach one half of the Sat'd OD absorbance value at         room temperature (23° C.), after removal of the source of         activating light. The results are recorded in Table 1.

TABLE 1 Photochromic Performance Test Results Example λ_(max-vis) Sensitivity ΔOD @ T½ Number (nm) ΔOD/MIN Saturation seconds 1 601 0.41 0.68 179 2 631 0.67 0.70 92 3 609 0.65 1.19 252 4 583 0.33 0.25 49 5 507 0.26 0.36 212 6 526 0.41 0.23 28 7 522 0.42 0.23 27 CE-1 600 0.61 1.34 358 CE-2 542 0.31 0.77 224 CE-3 508 0.27 0.29 60

-   -   It is to be understood that the present description illustrates         aspects of the invention relevant to a clear understanding of         the invention. Certain aspects of the invention that would be         apparent to those of ordinary skill in the art and that,         therefore, would not facilitate a better understanding of the         invention have not been presented in order to simplify the         present description. Although the present invention has been         described in connection with certain embodiments, the present         invention is not limited to the particular embodiments         disclosed, but is intended to cover modifications that are         within the spirit and scope of the invention, as defined by the         appended claims. 

We claim:
 1. A naphthol represented by the following graphic formula:

wherein: (A) substituent Q comprises —N₃, —CN, —COOR′, —CCR′, —C(R′)C(R′)R′, —OCOR′, —OCOOR′, —SR′, —OSO₂Rm′″, and/or CON(R′)R′, wherein each R′ independently comprises hydrogen, an unsubstituted or substituted alkyl group having from 1 to 18 carbon atoms, an unsubstituted or substituted aryl group, an unsubstituted or substituted alkene or alkyne group having from 2 to 18 carbon atoms, wherein said substituents are chosen from halo and hydroxyl and R′″ comprises —CF₃ or a perfluorinated alkyl group having from 2 to 18 carbon atoms; and (B) each i is an integer chosen from 0 to the total number of available positions and each R is independently chosen for each occurrence from: (a) hydrogen, C₁-C₁₈ alkyl, C₂-C₁₈ alkylidene, C₂-C₁₈ alkylidyne, vinyl, C₃-C₁₀ cycloalkyl, C₁-C₁₈ haloalkyl, allyl, halogen, and benzyl that is unsubstituted or mono-substituted with at least one of C₁-C₁₈ alkyl and C₁-C₁₈ alkoxy; (b) phenyl that is mono-substituted at the para position with at least one substituent chosen from: C₁-C₁₈ alkoxy, linear or branched chain C₁-C₂₀ alkylene, linear or branched chain C₁-C₄ polyoxyalkylene, cyclic C₃-C₂₀ alkylene, phenylene, naphthylene, C₁-C₁₈ alkyl substituted phenylene, mono- or poly-urethane(C₁-C₂₀)alkylene, mono- or poly-ester(C₁-C₂₀)alkylene, mono- or poly-carbonate(C₁-C₂₀)alkylene, polysilanylene, polysiloxanylene and mixtures thereof wherein the at least one substituent is connected to an aryl group of a photochromic material; (c) —CH(CN)₂ and —CH(COOX₁)₂, wherein X₁ is chosen from at least one of a lengthening agent L, hydrogen, C₁-C₁₈ alkyl that is unsubstituted or mono-substituted with phenyl, phenyl(C₁-C₁₈)alkyl that is mono-substituted with C₁-C₁₈ alkyl, C₁-C₁₈ haloalkyl, or C₁-C₁₈ alkoxy, and an aryl group that is unsubstituted, mono- or di-substituted, wherein each aryl substituent is independently chosen from C₁-C₁₈ alkyl, C₁-C₁₈ haloalkyl, lengthening agent L and C₁-C₁₈ alkoxy; (d) —CH(X₂)(X₃), wherein: (i) X₂ is chosen from at least one of a lengthening agent L, hydrogen, C₁-C₁₈ alkyl, and an aryl group that is unsubstituted, mono- or di-substituted, wherein each aryl substituent is independently chosen from C₁-C₁₈ alkyl and C₁-C₁₈ alkoxy; and (ii) X₃ is chosen from at least one of —COOX₁, —COX₁, —COX₄, and —CH₂OX₅, wherein: (A) X₄ is chosen from at least one of morpholino, piperidino, amino that is unsubstituted, mono- or di-substituted with C₁-C₁₈ alkyl, and an unsubstituted, mono or di-substituted group chosen from phenylamino and diphenylamino, wherein each substituent is independently chosen from C₁-C₁₈ alkyl or C₁-C₁₈ alkoxy; and (B) X₅ is chosen from a lengthening agent L, hydrogen, —C(O)X₂, C₁-C₁₈ alkyl that is unsubstituted or mono-substituted with (C₁-C₁₈)alkoxy or phenyl, phenyl(C₁-C₁₈)alkyl that is mono-substituted with (C₁-C₁₈)alkoxy, and an aryl group that is unsubstituted, mono- or di-substituted, wherein each aryl substituent is independently chosen from C₁-C₁₈ alkyl and C₁-C₁₈ alkoxy; (e) an unsubstituted, mono-, di-, or tri-substituted aryl group; 9-julolidinyl; or an unsubstituted, mono- or di-substituted heteroaromatic group chosen from pyridyl, furanyl, benzofuran-2-yl, benzofuran-3-yl, thienyl, benzothien-2-yl, benzothien-3-yl, dibenzofuranyl, dibenzothienyl, carbazoyl, benzopyridyl, indolinyl, and fluorenyl; wherein each aryl and heteroaromatic substituent is independently chosen for each occurrence from: (i) a lengthening agent L; (ii) —COOX₁ or —C(O)X₆, wherein X₆ is chosen from at least one of: a lengthening agent L, hydrogen, C₁-C₁₈ alkoxy, phenoxy that is unsubstituted, mono- or di-substituted with C₁-C₁₈ alkyl or C₁-C₁₈ alkoxy, an aryl group that is unsubstituted, mono- or di-substituted with C₁-C₁₈ alkyl or C₁-C₁₈ alkoxy, an amino group that is unsubstituted, mono- or di-substituted with C₁-C₁₈ alkyl, and a phenylamino group that is unsubstituted, mono- or di-substituted with C₁-C₁₈ alkyl or C₁-C₁₈ alkoxy; (iii) aryl, haloaryl, C₃-C₁₀ cycloalkylaryl, and an aryl group that is mono- or di-substituted with C₁-C₁₈ alkyl or C₁-C₁₈ alkoxy; (iv) C₁-C₁₈ alkyl, C₃ - C₁₀ cycloalkyl, C₃-C₁₀cycloalkyloxy(C₁-C₁₈)alkyl, aryl(C₁-C₁₈)alkyl, aryloxy(C₁-C₁₈)alkyl, mono- or di-(C₁-C₁₈)alkylaryl (C₁-C₁₈)alkyl, mono- or di-(C₁-C₁₈)alkoxyaryl(C₁-C₁₈)alkyl, C₁-C₁₈ haloalkyl, and mono(C₁-C₁₈)alkoxy(C₁-C₁₈)alkyl; (v) C₁-C₁₈ alkoxy, C₃-C₁₀ cycloalkoxy; cycloalkyloxy(C₁-C₁₈)alkoxy, aryl(C₁-C₁₈)alkoxy, aryloxy(C₁-C₁₈)alkoxy, mono- or di-(C₁-C₁₈)alkylaryl(C₁-C₁₈)alkoxy, and mono- or di-(C₁-C₁₈)alkoxyaryl(C₁-C₁₈)alkoxy; (vi) aminocarbonyl, aminocarbonyl(C₁-C₁₈)alkylene, amino, mono- or di-(C₁-C₁₈)alkylamino, diarylamino, piperazino, N-(C₁-C₁₈)alkylpiperazino, N-arylpiperazino, aziridino, indolino, piperidino, morpholino, thiomorpholino, tetrahydroquinolino, tetrahydroisoquinolino, pyrrolidyl, hydroxy, acryloxy, methacryloxy, and halogen; (vii) —OX₇ or —N(X₇)₂, wherein X₇ is chosen from: (A) a lengthening agent L, hydrogen, C₁-C₁₈ alkyl, C₁-C₁₈ acyl, phenyl(C₁-C₁₈)alkyl, mono (C₁-C₁₈)alkyl substituted phenyl(C₁-C₁₈) alkyl, mono (C₁-C₁₈)alkoxy substituted phenyl(C₁-C₁₈)alkyl; C₁-C₁₈alkoxy(C₁-C₁₈)alkyl; C₃-C₁₀ cycloalkyl; mono(C₁-C₁₈)alkyl substituted C₃-C₁₀ cycloalkyl, C₁-C₁₈ haloalkyl, allyl, benzoyl, mono-subsituted benzoyl, naphthoyl or mono-substituted naphthoyl, wherein each of said benzoyl and naphthoyl substituents are independently chosen from C₁-C₁₈ alkyl, and C₁-C₁₈ alkoxy; (B) —CH(X₈)X₉, wherein X₈ is chosen from a lengthening agent L, hydrogen or C₁-C₁₈ alkyl; and X₉ is chosen from a lengthening agent L, —CN, —CF₃, or —COOX₁₀, wherein X₁₀ is chosen from a lengthening agent L, hydrogen or C₁-C₁₈ alkyl; (C) —C(O)X₆; or (D) tri(C₁-C₁₈)alkylsilyl, tri(C₁-C₁₈)alkylsilyloxy, tri(C₁-C₁₈)alkoxysilyl, tri(C₁-C₁₈)alkoxysilyloxy, di(C₁-C₁₈)alkyl(C₁-C₁₈alkoxy)silyl, di(C₁-C₁₈)alkyl(C₁-C₁₈ alkoxy)silyloxy, di(C₁-C₁₈)alkoxy(C₁-C₁₈ alkyl)silyl or di(C₁-C₁₈)alkoxy(C₁-C₁₈ alkyl)silyloxy; (viii) SX₁₁, wherein X₁₁ is chosen from a lengthening agent L, hydrogen, C₁-C₁₈alkyl, C₁-C₁₈haloalkyl, an aryl group that is unsubstituted, or mono- or di-substituted with C₁-C₁₈alkyl, C₁-C₁₈alkoxy, or halogen; (ix) a nitrogen containing ring represented by Formula i:

wherein (A) n is an integer chosen from 0, 1, 2, and 3, and each U is independently chosen for each occurrence from —CH₂—, —CH(X₁₂)—, —C(X₁₂)₂—, —CH(X₁₃)—, —C(X₁₃)₂—, and —C(X₁₂)(X₁₃)—, wherein X₁₂ is chosen from a lengthening agent L and C₁-C₁₈ alkyl, and X₁₃ is chosen from a lengthening agent L, phenyl and naphthyl, and (B) U′ is chosen from U, —O—, —S—, —S(O)—, —NH—, —N(X₁₂)— or —N(X₁₃)—, and m is an integer chosen from 1, 2, and 3, and (x) a group represented by Formula ii or iii:

wherein X₁₄, X₁₅, and X₁₆ are independently chosen for each occurrence from a lengthening agent L, hydrogen, C₁-C₁₈ alkyl, phenyl or naphthyl, or X₁₄ and X₁₅ together form a ring of 5 to 8 carbon atoms; p is an integer chosen from 0, 1, or 2, and X₁₇ is independently chosen for each occurrence from a lengthening agent L, C₁-C₁₈ alkyl, C₁-C₁₈ alkoxy, or halogen; (f) an unsubstituted or mono-substituted group chosen from pyrazolyl, imidazolyl, pyrazolinyl, imidazolinyl, pyrrolidinyl, phenothiazinyl, phenoxazinyl, phenazinyl, or acridinyl, wherein each substituent is independently chosen from a lengthening agent L, C₁-C₁₈ alkyl, C₁-C₁₈ alkoxy, phenyl, hydroxy, amino or halogen; (g) a group represented by Formula iv or v:

wherein (i) V′ is independently chosen in each formula from —O—, —CH—, C₁-C₆ alkylene, and C₃-C₁₀ cycloalkylene, (ii) V is independently chosen in each formula from —O— or —N(X₂₁)—, wherein X₂₁ is from a lengthening agent L represented by Formula I above, hydrogen, C₁-C₁₈ alkyl, and C₂-C₁₈ acyl, provided that if V is —N(X₂₁)—, V′ is —CH₂—, (iii) X₁₈ and X₁₉ are each independently chosen from a lengthening agent L, hydrogen and C₁-C₁₈ alkyl, and (iv) k is chosen from 0, 1, and 2, and each X₂₀ is independently chosen for each occurrence from a lengthening agent L, C₁-C₁₈ alkyl, C₁-C₁₈ alkoxy, hydroxy and halogen; (h) a group represented by Formula vi:

(i) X₂₂ is chosen from a lengthening agent L, hydrogen and C₁-C₁₈ alkyl, and (ii) X₂₃ is chosen from a lengthening agent L and an unsubstituted, mono-, or di-substituted group chosen from aryl, furanyl and thienyl, wherein each substituent is independently chosen for each occurrence from C₁-C₁₈ alkyl, C₁-C₁₈ alkoxy, and halogen; —C(O)X₂₄, wherein X₂₄ is chosen from a lengthening agent L, hydroxy, C₁-C₁₈ alkyl, C₁-C₁₈ haloalkyl, C₁-C₁₈ alkoxy, phenyl that is unsubstituted or mono-substituted with C₁-C₁₈ alkyl or C₁-C₁₈ alkoxy, amino that is unsubstituted, mono- or di-substituted with at least one of C₁-C₁₈ alkyl, aryl and benzyl; (j) —COOX₁; (k) —OX₇ and —N(X₇)₂; (l) —SX₁₁; (m) the nitrogen containing ring represented by Formula i; (n) the group represented by one of Formula ii or iii; (o) a lengthening agent L represented by: —[S₁]_(c)-[Q₁-[S₂]_(d)]_(d′)-[Q₂-[S₃]_(e)]_(e′)-[Q₃-[S₄]_(f)]_(f′)—S₅—P wherein: (i) each Q₁, Q₂, and Q₃ is independently chosen for each occurrence from: a divalent group chosen from: an unsubstituted or a substituted aromatic group, an unsubstituted or a substituted alicyclic group, an unsubstituted or a substituted heterocyclic group, and mixtures thereof, wherein substituents are chosen from: a group represented by P, liquid crystal mesogens, halogen, poly(C₁-C₁₈ alkoxy), C₁₈ alkoxycarbonyl, C₁-C₁₈ alkylcarbonyl, C₁-C₁₈ alkoxycarbonyloxy, aryloxycarbonyloxy, perfluoro(C₁-C₁₈)alkoxy, perfluoro(C₁-C₁₈)alkoxycarbonyl, perfluoro(C₁-C₈)alkylcarbonyl, perfluoro(C₁-C₁₈)alkylamino, di-(perfluoro(C₁-C₁₈)alkyl)amino, perfluoro(C₁-C₁₈)alkylthio, C₁-C₁₈ alkylthio, C₁-C₁₈ acetyl, C₃-C₁₀ cycloalkyl, C₃-C₁₀cycloalkoxy, a straight-chain or branched C₁-C₁₈ alkyl group that is mono-substituted with cyano, halo, or C₁-C₁₈ alkoxy, or poly-substituted with halo, and a group comprising one of the following formulae: -M(T)_((t−1)) and -M(OT)_((t−1)), wherein M is chosen from aluminum, antimony, tantalum, titanium, zirconium and silicon, T is chosen from organofunctional radicals, organofunctional hydrocarbon radicals, aliphatic hydrocarbon radicals and aromatic hydrocarbon radicals, and t is the valence of M; (ii) c, d, e, and f are each independently chosen from an integer ranging from 0 to 20, inclusive; and each S₁, S₂, S₃, S₄, and S₅ is independently chosen for each occurrence from a spacer unit chosen from: (1) —(CH₂)_(g)—, —(CF₂)_(h)—, —Si(CH₂)_(g)—, —(Si[(CH₃)₂]O)_(h)—, wherein g is independently chosen for each occurrence from 1 to 20; h is a whole number from 1 to 16 inclusive; (2) —N(Z)—, —C(Z)═C(Z)—, —C(Z)═N—, —C(Z′)—C(Z′)— or a single bond, wherein Z is independently chosen for each occurrence from hydrogen, C₁-C₁₈ alkyl, C₃-C₁₀ cycloalkyl and aryl, and Z′ is independently chosen for each occurrence from C₁-C₁₈ alkyl, C₃-C₁₀ cycloalkyl and aryl; and (3) —O—, —C(O)—, —C≡C—, —N═N—, —S—, —S(O)—, —S(O)(O)—, —(O)S(O)—, —(O)S(O)O—, —O(O)S(O)O—, or straight-chain or branched C₁-C₂₄ alklene residue, said C₁-C₂₄ alkylene residue being unsubstituted, mono-substituted by cyano or halo, or poly-substituted by halo; provided that when two spacer units comprising heteroatoms are linked together the spacer units are linked so that heteroatoms are not directly linked to each other and when S₁ and S₅ are linked to PC and P, respectively, they are linked so that two heteroatoms are not directly linked to each other; (iii) P is chosen from: hydroxy, amino, C₂-C₁₈ alkenyl, C₂-C₁₈ alkynyl, azido, silyl, siloxy, silylhydride, (tetrahydro-2H-pyran-2-yl)oxy, thio, isocyanato, thioisocyanato, acryloyloxy, methacryloyloxy, 2-(acryloyloxy)ethylcarbamyl, 2-(methacryloyloxy)ethylcarbamyl, aziridinyl, allyloxycarbonyloxy, epoxy, carboxylic acid, carboxylic ester, acryloylamino, methacryloylamino, aminocarbonyl, C₁-C₁₈ alkyl aminocarbonyl, aminocarbonyl(C₁-C₁₈)alkyl, C₁-C₁₈ alkyloxycarbonyloxy, halocarbonyl, hydrogen, aryl, hydroxy(C₁-C₁₈)alkyl, C₁-C₁₈ alkyl, C₁-C₁₈ alkoxy, amino (C₁-C₁₈)alkyl, C₁-C₁₈ alkylamino, di-(C₁C₁₈) alkyl amino, C₁-C₁₈ alkyl(C₁-C₁₈)alkoxy, C₁-C₁₈ alkoxy(C₁-C₁₈)alkoxy, nitro, poly(C₁-C₁₈)alkyl ether, (C₁-C₁₈)alkyl(C₁-C₁₈)alkoxy(C₁-C₁₈)alkyl, polyethyleneoxy, polypropyleneoxy, ethylenyl, acryloyl, acryloyloxy(C₁-C₁₈)alkyl, methacryloyl, methacryloyloxy(C₁-C₁₈)alkyl, 2-chloroacryloyl, 2-phenylacryloyl, acryloyloxyphenyl, 2-chloroacryloylamino, 2-phenylacryloylaminocarbonyl, oxetanyl, glycidyl, cyano, isocyanato(C₁-C₁₈)alkyl, itaconic acid ester, vinyl ether, vinyl ester, a styrene derivative, main-chain and side-chain liquid crystal polymers, siloxane derivatives, ethyleneimine derivatives, maleic acid derivatives, fumaric acid derivatives, unsubstituted cinnamic acid derivatives, cinnamic acid derivatives that are substituted with at least one of methyl, methoxy, cyano and halogen, or substituted or unsubstituted chiral or non-chiral monovalent or divalent groups chosen from steroid radicals, terpenoid radicals, alkaloid radicals and mixtures thereof, wherein the substituents are independently chosen from C₁-C₁₈ alkyl, C₁-C₁₈ alkoxy, amino, C₃-C₁₀ cycloalkyl, C₁-C₁₈ alkyl(C₁-C₁₈)alkoxy, fluoro(C₁C₁₈)alkyl, cyano, cyano(C₁-C₁₈)alkyl, cyano(C₁-C₁₈)alkoxy or mixtures thereof, or P is a structure having from 2 to 4 reactive groups or P is an unsubstituted or substituted ring opening metathesis polymerization precursor; and (iv) d′, e′ and f′ are each independently chosen from 0, 1, 2, 3, and 4, provided that a sum of d′+e′+f′ is at least 1; (p) immediately adjacent R groups together form a group represented by Formula vii, viii, or ix:

wherein (i) W and W′ are independently chosen for each occurrence from —O—, —N(X₇)—, —C(X₁₄)—, —C(X₁₇)—, (ii) X₁₄, X₁₅ and X₁₇ are as set forth above, and (iii) q is an integer chosen from 0, 1, 2, 3, and
 4. 2. The naphthol of claim 1 represented by the following graphic formula:

wherein substituent Q comprises —CN, —COOR′, —CCR′, —C(R′)C(R′)R′, —OCOR′, —OCOOR′, —SR′, —OSO₂R′″, or —CON(R′)R′, and wherein each R′ independently comprises an alkyl group having from 1 to 12 carbon atoms and R′″ comprises —CF₃ or a perfluorinated alkyl group having from 2 to 12 carbon atoms.
 3. A naphthol represented by the following graphic formula:

wherein: (A) each substituent Q independently comprising —N₃, —CN, —CCR′, —C(R′)C(R′)R′, —OCOR′, —OCOOR′, —SR′, —OSO₂R′″, and/or —CON(R′)R′, wherein each R′ independently comprises hydrogen, an unsubstituted or substituted alkyl group having from 1 to 18 carbon atoms, an unsubstituted or substituted aryl group, an unsubstituted or substituted alkene or alkyne group having from 2 to 18 carbon atoms, wherein said substituents are chosen from halo and hydroxyl and R′″ comprises —CF₃ or a perfluorinated alkyl group having from 2 to 18 carbon atoms; and (B) i is an integer chosen from 0 to the total number of available positions and each R is independently chosen for each occurrence from: (a) hydrogen, C₁-C₁₈ alkyl, C₂-C₁₈ alkylidene, C₂-C₁₈ alkylidyne, vinyl, C₃-C₁₀ cycloalkyl, C₁-C₁₈ haloalkyl, allyl, halogen, and benzyl that is unsubstituted or mono-substituted with at least one of C₁-C₁₈ alkyl and C₁-C₁₈ alkoxy; (b) phenyl that is mono-substituted at the para position with at least one substituent chosen from: C₁-C₁₈ alkoxy, linear or branched chain C₁-C₂₀ alkylene, linear or branched chain C₁-C₄ polyoxyalkylene, cyclic C₃-C₂₀ alkylene, phenylene, naphthylene, C₁-C₁₈ alkyl substituted phenylene, mono- or poly-urethane(C₁-C₂₀)alkylene, mono- or poly-ester(C₁-C₂₀)alkylene, mono- or poly-carbonate(C₁-C₂₀)alkylene, polysilanylene, polysiloxanylene and mixtures thereof, wherein the at least one substituent is connected to an aryl group of a photochromic material; (c) —CH(CN)₂ and —CH(COOX₁)₂, wherein X₁ is chosen from at least one of a lengthening agent L, hydrogen, C₁-C₁₈ alkyl that is unsubstituted or mono-substituted with phenyl, phenyl(C₁-C₁₈)alkyl that is mono-substituted with C₁-C₁₈ alkyl, C₁-C₁₈ haloalkyl, or C₁-C₁₈ alkoxy, and an aryl group that is unsubstituted, mono- or di-substituted, wherein each aryl substituent is independently chosen from C₁-C₁₈ alkyl, C₁-C₁₈ haloalkyl, lengthening agent L and C₁-C₁₈ alkoxy; (d) —CH(X₂)(X₃), wherein: (i) X₂ is chosen from at least one of a lengthening agent L, hydrogen, C₁-C₁₈ alkyl, and an aryl group that is unsubstituted, mono- or di-substituted, wherein each aryl substituent is independently chosen from C₁-C₁₈ alkyl and C₁-C₁₈ alkoxy; and (ii) X₃ is chosen from at least one of —COOX₁, —COX₁, —COX₄, and —CH₂OX₅, wherein: (A) X₄ is chosen from at least one of morpholino, piperidino, amino that is unsubstituted, mono- or di- substituted with C₁-C₁₈ alkyl, and an unsubstituted, mono or di- substituted group chosen from phenylamino and diphenylamino, wherein each substituent is independently chosen from C₁-C₁₈alkyl or C₁-C₁₈alkoxy; and (B) X₅is chosen from a lengthening agent L, hydrogen, —C(O)X₂, C₁-C₁₈ alkyl that is unsubstituted or mono-substituted with (C₁-C₁₈)alkoxy or phenyl, phenyl(C₁-C₁₈)alkyl that is mono-substituted with (C₁-C₁₈)alkoxy, and an aryl group that is unsubstituted, mono- or di-substituted, wherein each aryl substituent is independently chosen from C₁-C₁₈ alkyl and C₁-C₁₈ alkoxy; (e) an unsubstituted, mono-, di-, or tri- substituted aryl group; 9-julolidinyl; or an unsubstituted, mono- or di-substituted heteroaromatic group chosen from pyridyl, furanyl, benzofuran-2-yl, benzofuran-3-yl, thienyl, benzothien-2-yl, benzothien-3-yl, dibenzofuranyl, dibenzothienyl, carbazoyl, benzopyridyl, indolinyl, and fluorenyl; wherein each aryl and heteroaromatic substituent is independently chosen for each occurrence from: (i) a lengthening agent L; (ii) —COOX₁ or —C(O)X₆, wherein X₆ is chosen from at least one of: a lengthening agent L, hydrogen, C₁-C₁₈ alkoxy, phenoxy that is unsubstituted, mono- or di-substituted with C₁-C₁₈ alkyl or C₁-C₁₈ alkoxy, an aryl group that is unsubstituted, mono- or di-substituted with C₁-C₁₈ alkyl or C₁-C₁₈ alkoxy, an amino group that is unsubstituted, mono- or di-substituted with C₁-C₁₈ alkyl, and a phenylamino group that is unsubstituted, mono- or di-substituted with C₁-C₁₈ alkyl or C₁-C₁₈ alkoxy; (iii) aryl, haloaryl, C₃-C₁₀ cycloalkylaryl, and an aryl group that is mono- or di- substituted with C₁-C ₁₈ alkyl or C₁-C₁₈ alkoxy; (iv) C₁-C₁₈ alkyl, C₃-C₁₀ cycloalkyl, C₃-C₁₀ cycloalkyloxy(C₁-C₁₈)alkyl, aryl(C₁-C₁₈)alkyl, aryloxy(C₁-C₁₈)alkyl, mono- or di- (C₁-C₁₈)alkylaryl(C₁-C₁₈)alkyl, mono- or di-(C₁-C₁₈)alkoxyaryl(C₁-C₁₈)alkyl, C₁-C₁₈ haloalkyl, and mono(C₁-C₁₈)alkoxy(C₁-C₁₈)alkyl; (v) C₁-C₁₈ alkoxy, C₃-C₁₀ cycloalkoxy; cycloalkyloxy(C₁-C₁₈)alkoxy, aryl(C₁-C₁₈)alkoxy, aryloxy(C₁-C₁₈)alkoxy, mono- or di- (C₁-C₁₈)alkylaryl(C₁-C₁₈)alkoxy, and mono- or di- (C₁-C₁₈)alkoxyaryl(C₁-C₁₈)alkoxy; (vi) aminocarbonyl, aminocarbonyl(C₁-C₁₈)alkylene, amino, mono- or di-(C₁-C₁₈)alkylamino, diarylamino, piperazino, N—(C₁-C₁₈)alkylpiperazino, N-arylpiperazino, aziridino, indolino, piperidino, morpholino, thiomorpholino, tetrahydroquinolino, tetrahydroisoquinolino, pyrrolidyl, hydroxy, acryloxy, methacryloxy, and halogen; (vii) —OX₇ or —N(X₇)₂, wherein X₇ is chosen from: (A) a lengthening agent L, hydrogen, C₁-C₁₈ alkyl, C₁-C₁₈ acyl, phenyl(C₁-C₁₈)alkyl, mono(C₁-C₁₈)alkyl substituted phenyl(C₁-C₁₈) alkyl, mono(C₁-C₁₈)alkoxy substituted phenyl(C₁-C₁₈)alkyl; C₁-C₁₈ alkoxy(C₁-C₁₈)alkyl; C₃-C₁₀ cycloalkyl; mono(C₁-C₁₈)alkyl substituted C₃-C₁₀ cycloalkyl, C₁-C₁₈ haloalkyl, allyl, benzoyl, mono-subsituted benzoyl, naphthoyl or mono-substituted naphthoyl, wherein each of said benzoyl and naphthoyl substituents are independently chosen from C₁-C₁₈ alkyl, and C₁-C₁₈ alkoxy; (B) —CH(X₈)X₉, wherein X₈ is chosen from a lengthening agent L, hydrogen or C₁-C₁₈ alkyl; and X₉ is chosen from a lengthening agent L, —CN, —CF₃, or —COOX₁₀, wherein X₁₀ is chosen from a lengthening agent L, hydrogen or C₁-C₁₈ alkyl; (C) —C(O)X₆; or (D) tri(C₁-C₁₈)alkylsilyl, tri(C₁-C₁₈)alkylsilyloxy, tri(C₁-C₁₈)alkoxysilyl, tri(C₁-C₁₈)alkoxysilyloxy, di(C₁-C₁₈)alkyl(C₁-C₁₈ alkoxy)silyl, di(C₁-C₁₈)alkyl(C₁-C₁₈ alkoxy)silyloxy, di(C₁-C₁₈)alkoxy(C₁-C₁₈ alkyl)silyl or di(C₁-C₁₈ alkyl)silyloxy; (viii) SX₁₁, wherein X₁₁ is chosen from a lengthening agent L, hydrogen, C₁-C₁₈ alkyl, C₁-C₁₈ haloalkyl, an aryl group that is unsubstituted, or mono- or di- substituted with C₁-C₁₈ alkyl, C₁-C₁₈ alkoxy, or halogen; (ix) a nitrogen containing ring represented by Formula i:

wherein (A) n is an integer chosen from 0, 1, 2, and 3, and each U is independently chosen for each occurrence from —CH₂—, —CH(X₁₂)—, —C(X₁₂)₂—, —CH(X₁₃)—, —C(X₁₃)₂—, and —C(X₁₂)(X₁₃)—, wherein X₁₂ is chosen from a lengthening agent L and C₁-C₁₈ alkyl, and X₁₃ is chosen from a lengthening agent L, phenyl and naphthyl, and (B) U′ is chosen from U, —O—, —S—, —S(O)—, —NH—, —N(X₁₂)— or —N(X₁₃)—, and m is an integer chosen from 1, 2, and 3, and (x) a group represented by Formula ii or iii:

wherein X₁₄, X₁₅, and X₁₆ are independently chosen for each occurrence from a lengthening agent L, hydrogen, C₁-C₁₈ alkyl, phenyl or naphthyl, or X₁₄ and X₁₅ together form a ring of 5 to 8 carbon atoms; p is an integer chosen from 0, 1, or 2, and X₁₇ is independently chosen for each occurrence from a lengthening agent L, C₁-C₁₈ alkyl, C₁-C₁₈ alkoxy, or halogen; (f) an unsubstituted or mono-substituted group chosen from pyrazolyl, imidazolyl, pyrazolinyl, imidazolinyl, pyrrolidinyl, phenothiazinyl, phenoxazinyl, phenazinyl, or acridinyl, wherein each substituent is independently chosen from a lengthening agent L, C₁-C₁₈ alkyl, C₁-C₁₈ alkoxy, phenyl, hydroxy, amino or halogen; (g) a group represented by Formula iv or v:

wherein (i) V′ is independently chosen in each formula from —O—, —CH—, C₁-C₆ alkylene, and C₃-C₁₀ cycloalkylene, (ii) V is independently chosen in each formula from —O—or —N(X₂₁)—, wherein X₂₁ is from a lengthening agent L represented by Formula I above, hydrogen, C₁-C₁₈ alkyl, and C₂-C₁₈ acyl, provided that if V is —N(X₂₁)—, V′ is —CH₂—, (iii) X₁₈ and X₁₉ are each independently chosen from a lengthening agent L, hydrogen and C₁-C₁₈ alkyl, and (iv) k is chosen from 0, 1, and 2, and each X₂₀ is independently chosen for each occurrence from a lengthening agent L, C₁-C₁₈ alkyl, C₁-C₁₈ alkoxy, hydroxy and halogen; (h) a group represented by Formula vi:

(i) X₂₂ is chosen from a lengthening agent L, hydrogen and C₁-C₁₈ alkyl, and (ii) X₂₃ is chosen from a lengthening agent L and an unsubstituted, mono-, or di-substituted group chosen from aryl, furanyl and thienyl, wherein each substituent is independently chosen for each occurrence from C₁-C₁₈ alkyl, C₁-C₁₈ alkoxy, and halogen; —C(O)X₂₄, wherein X₂₄ is chosen from a lengthening agent L, hydroxy, C₁-C₁₈ alkyl, C₁-C₁₈ haloalkyl, C₁-C₁₈ alkoxy, phenyl that is unsubstituted or mono-substituted with C₁-C₁₈ alkyl or C₁-C₁₈ alkoxy, amino that is unsubstituted, mono- or di-substituted with at least one of C₁-C₁₈ alkyl, aryl and benzyl; (j) —COOX₁; (k) —OX₇ and —N(X₇)₂; (l) —SX₁₁; (m) the nitrogen containing ring represented by Formula i; (n) the group represented by one of Formula ii or iii; (o) a lengthening agent L represented by: —[S₁]_(c)-[Q₁-[S₂]_(d)]_(d′)-[Q₂-[S₃]_(e)]_(e′)-[Q₃-[S₄]_(f)]_(f′)—S₅—P wherein: (i) each Q₁, Q₂, and Q₃ is independently chosen for each occurrence from: a divalent group chosen from: an unsubstituted or a substituted aromatic group, an unsubstituted or a substituted alicyclic group, an unsubstituted or a substituted heterocyclic group, and mixtures thereof, wherein substituents are chosen from: a group represented by P, liquid crystal mesogens, halogen, poly(C₁-C₁₈ alkoxy), C₁-C₁₈ alkoxycarbonyl, C₁-C₁₈ alkylcarbonyl, C₁-C₁₈alkoxycarbonyloxy, aryloxycarbonyloxy, perfluoro(C₁-C₁₈)alkoxy, perfluoro(C₁-C₁₈) alkoxycarbonyl, perfluoro(C₁-C₁₈)alkylcarbonyl, perfluoro(C₁-C₁₈)alkylamino, di-(perfluoro(C₁-C₁₈)alkyl)amino, perfluoro(C₁-C₁₈)alkylthio, C₁-C₁₈ alkylthio, C₁-C₁₈ acetyl, C₃-C₁₀ cycloalkyl, C₃-C₁₀ cycloalkoxy, a straight-chain or branched C₁-C₁₈ alkyl group that is mono-substituted with cyano, halo, or C₁-C₁₈ alkoxy, or poly-substituted with halo, and a group comprising one of the following formulae: -M(T)(_(t−1)) and -M(OT)(_(t−1)), wherein M is chosen from aluminum, antimony, tantalum, titanium, zirconium and silicon, T is chosen from organofunctional radicals, organofunctional hydrocarbon radicals, aliphatic hydrocarbon radicals and aromatic hydrocarbon radicals, and t is the valence of M; (ii) c, d, e, and f are each independently chosen from an integer ranging from 0 to 20, inclusive; and each S₁, S₂, S₃, S₄, and S₅ is independently chosen for each occurrence from a spacer unit chosen from: (1) —(CH₂)_(g)—, —(CF₂)h—, —Si(CH₂)_(g)—, —(Si[(CH₃)₂]O)_(h)—, wherein g is independently chosen for each occurrence from 1 to 20; h is a whole number from 1 to 16 inclusive; (2) —N(Z)—, —C(Z)═C(Z)—, —C(Z)═N—, —C(Z′)—C(Z′)— or a single bond, wherein Z is independently chosen for each occurrence from hydrogen, C₁-C₁₈ alkyl, C₃-C₁₀ cycloalkyl and aryl, and Z′ is independently chosen for each occurrence from C₁-C₁₈ alkyl, C₃-C₁₀ cycloalkyl and aryl; and (3) —O—, —C(O)—, —C≡C—, —N═N—, —S—, —S(O)—, —S(O)(O)—, —(O)S(O)—, —(O)S(O)O—, —O(O)S(O)O—, or straight-chain or branched C₁-C₂₄ alklene residue, said C₁-C₂₄ alkylene residue being unsubstituted, mono-substituted by cyano or halo, or poly-substituted by halo; provided that when two spacer units comprising heteroatoms are linked together the spacer units are linked so that heteroatoms are not directly linked to each other and when S₁ and S₅ are linked to PC and P, respectively, they are linked so that two heteroatoms are not directly linked to each other; (iii) P is chosen from: hydroxy, amino, C₂-C₁₈ alkenyl, C₂-C₁₈ alkynyl, azido, silyl, siloxy, silylhydride, (tetrahydro-2H-pyran-2-yl)oxy, thio, isocyanato, thioisocyanato, acryloyloxy, methacryloyloxy, 2-(acryloyloxy)ethylcarbamyl, 2-(methacryloyloxy)ethylcarbamyl, aziridinyl, allyloxycarbonyloxy, epoxy, carboxylic acid, carboxylic ester, acryloylamino, methacryloylamino, aminocarbonyl, C₁-C₁₈ alkyl aminocarbonyl, aminocarbonyl(C₁-C₁₈)alkyl, C₁-C₁₈ alkyloxycarbonyloxy, halocarbonyl, hydrogen, aryl, hydroxy(C₁-C₁₈)alkyl, C₁-C₁₈ alkyl, C₁-C₁₈ alkoxy, amino(C₁-C₁₈)alkyl, C₁-C₁₈ alkylamino, di-(C₁-C₁₈) alkylamino, C₁-C₁₈ alkyl(C₁-C₁₈)alkoxy, C₁-C₁₈ alkoxy(C₁-C₁₈)alkoxy, nitro, poly(C₁-C₁₈) alkyl ether, (C₁-C₁₈)alkyl(C₁-C₁₈)alkoxy(C₁-C₁₈)alkyl, polyethyleneoxy, polypropyleneoxy, ethylenyl, acryloyl, acryloyloxy(C₁-C₁₈)alkyl, methacryloyl, methacryloyloxy(C₁-C₁₈)alkyl, 2-chloroacryloyl, 2-phenylacryloyl, acryloyloxyphenyl, 2-chloroacryloylamino, 2-phenylacryloylaminocarbonyl, oxetanyl, glycidyl, cyano, isocyanato(C₁-C₁₈)alkyl, itaconic acid ester, vinyl ether, vinyl ester, a styrene derivative, main-chain and side-chain liquid crystal polymers, siloxane derivatives, ethyleneimine derivatives, maleic acid derivatives, fumaric acid derivatives, unsubstituted cinnamic acid derivatives, cinnamic acid derivatives that are substituted with at least one of methyl, methoxy, cyano and halogen, or substituted or unsubstituted chiral or non-chiral monovalent or divalent groups chosen from steroid radicals, terpenoid radicals, alkaloid radicals and mixtures thereof, wherein the substituents are independently chosen from C₁-C₁₈ alkyl, C₁-C₁₈ alkoxy, amino, C₃-C₁₀ cycloalkyl, C₁-C₁₈ alkyl(C₁-C₁₈)alkoxy, fluoro(C₁-C₁₈)alkyl, cyano, cyano(C₁-C₁₈)alkyl, cyano(C₁-C₁₈)alkoxy or mixtures thereof, or P is a structure having from 2 to 4 reactive groups or P is an unsubstituted or substituted ring opening metathesis polymerization precursor; and (iv) d′, e′ and f′ are each independently chosen from 0, 1, 2, 3, and 4, provided that a sum of d′+e′+f′ is at least 1; (p) immediately adjacent R groups together form a group represented by Formula vii, viii, or ix:

wherein (i) W and W′ are independently chosen for each occurrence from —O—, —N(X₇)—, —C(X₁₄)—, —C(X₁₇)—, (ii) X₁₄, X₁₅ and X₁₇ are as set forth above, and (iii) q is an integer chosen from 0, 1, 2, 3, and
 4. 